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Manufactory quartz glass and articles thereof

Manufactory quartz glass and articles thereof

Free for one month and pay only if you like it. By judgment and order dated 28th October, , in Appeal No. The questions for consideration before the Tribunal were: 1 Whether grinding and polishing of Opthalmic Blanks into Glass Moulds amounts to manufacture? For the first question, the Tribunal came to the conclusion that the product which comes out after grinding and polishing is product completely different from raw-material, namely, the opthalmic blanks. The ground and polished material acquires different characteristic and properties, and a new product distinct in name, character and use comes into existence after the process of grinding and polishing. Thus, the process of grinding and polishing is nothing but a process of manufacture.

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CROSS-REFERENCE TO RELATED APPLICATIONS

VIDEO ON THE TOPIC: Glassomer—Processing Fused Silica Glass Like a Polymer

The use of hazardous or toxic waste to make a glass material a useful product is provided for herein, however, vitrification of hazardous waste for purposes of containment is excluded, see References to Other Classes below. Included within the scope of the class definition are:. Search notes relating to a processes and apparatus and b products will be identified appropriately. Although silicon and silicon dioxide are arbitrarily considered to be glass materials for Class 65, a process of growing these polycrystalline materials is proper for Class 23, even though a rod is used as a bait, unless the shape formed is not a result of crystallization or deposition on the rod.

Processes of growing single-crystal of all types of materials, including silicon or silicon dioxide, are proper for Class Although silicon and silicon dioxide are arbitrarily considered to be glass for Class 65, a process of, or apparatus for, growing crystals of these materials is placed in Class 23 for a process exception, see 5 Note in Class , subclasses 1. A patent claiming a Class 23 species of crystallization and a Class 65 species or having a multiple disclosure with generic claims only is classified in Class Class , Semiconductor Device Manufacturing: Process, for the combination of Class unit coating operation or Class unit etching operation with glass melting, shaping or forming, joining, or heat treating.

Moreover, Class also takes the heat treating, per se, of Class semiconductor material if for purposes of modifying the electrical properties thereof. See notes therein for a detailed explanation of the relevant lines. See Subclass References to the Current Class, above, for a subclass reference to the term "anneal.

See Subclass References to the Current Class, above, for a subclass reference to the term "bait. A properly proportioned mixture of raw materials to be delivered to a melting apparatus. Mechanical means for introducing a batch to a melting apparatus. Shaping or forming an undefined mass of glass in a soft state by introducing gas within a confined opening within the mass, i.

A hollow wall generally having an air space between refractory blocks from which it is formed and providing an opening or throat adjacent its bottom used in a tank furnace to separate a working end from a fining or melting zone. Forming a glass preform by flowing molten glass in the form of a stream into or onto molds, rolls or tables. Teeming is synonymous to casting. See Subclass References to the Current Class, above, for a subclass reference to the term "coating.

Shaping a layer throughout its thickness into a row of wavelike folds. Glassware having a surface which was intentionally cracked by water immersion and partially healed by reheating. A slotted floating, refractory block through which glass issues in the formation of a glass sheet during a drawing operation. The changing of glass in the amorphous state to crystalline state generally by holding a glass melt at a temperature which favors crystal growth.

A boxlike wing on a glass furnace through which a batch or floaters, etc. Forming stock, generally sheet or tube, by utilizing the self-cohesiveness of glass in a plastic condition to effect an operation similar to a "taffy-pull". A refractory device placed in a supply of molten glass to define an area for drawing. Baffle means isolating stock being drawn from the hot atmosphere existing above a supply of molten glass.

Altering a surface configuration only of glass by raising a boss or protuberance thereon or causing surface portions to be depressed below the plane of the glass surface. See Subclass References to the Current Class, above, for a subclass reference to the term "fiber. See Subclass References to the Current Class, above, for a subclass reference to the term "filament.

See Subclass References to the Current Class, above, for a subclass reference to the term "fining. Heating of the outer surface of hard glass to a temperature where that surface only melts and surface tension causes smoothing thereof, the heating usually being by fire or flame contact of the glass surface. Applying a thin layer of opaque or colored glass to the surface of clear glass, or vice versa. Refractory blocks floating on molten glass in a tank furnace to prevent gall or scum from entering the working end.

Welding by bringing glass, while molten or softened by heating, into intimate contact with another part with subsequent cooling to solid phase whereby uniting is effected. Means used to remove discrete charges of molten glass from a supply. An inorganic product a the constituents of which generally include a "glass former" e.

Effecting a change in a physical or chemical property of glass, generally involving specific heating followed by controlled cooling. Molding, shaping, severing of uniting of glass while in a plastic state. A discrete portion of molten glass a delivered by a feeder or b gathered on a punty or blow pipe.

See Subclass References to the Current Class, above, for a subclass reference to the term "homogenize. Rolling a gather of glass on a flat plate whereby it is shaped and cooled. Surplus or waste glass which must be removed from the apparatus or a product after a glass working operation.

That portion of a segmented mold used to form a neck portion of a hollow article. Causing movement in a regular, generally a circular or elliptical path around a fixed point. A partially shaped article of manufacture requiring further significant shaping to arrive at the form of a completed useful article. See Subclass References to the Current Class, above, for a subclass reference to the term "parting layer.

A mold with an inner lining of a paste generally made from resins and linseed oil, soap, etc. A dipstick used to gather charges of molten glass, punty, puntil, pontee, and ponto are local variants.

Stock material that has been given a shape the term preform is used interchangeably with article, product, parison and blank. See Subclass References to the Current Class, above, for a subclass reference to the term "press molding.

See Subclass References to the Current Class, above, for a subclass reference to the term "purify. Changing the gross overall configuration of a glass preform by a confining a glass preform within a configured mold and effecting significant flow of the glass to cause it to assume the configuration of the mold or b distorting a glass preform by bodily moving a portion of it throughout its entire thickness relative to a second portion during which the thickness of the work piece remains substantially the same and no significant flow of the glass occurs, i.

Changing at least one dimension of a glass preform throughout its perimeter without any appreciable change in the original configuration thereof, e. The coalescence of particles into one solid mass through heating, generally with melting limited to a surface layer only of each particle.

See Subclass References to the Current Class, above, for a subclass reference to the term "slag. See Subclass References to the Current Class, above, for a subclass reference to the term "slinger. Removing surface irregularities or imperfections. Glass that has been heated to a temperature at which it is pliable or liquid.

The temperature at which a uniform fiber, 0. Littleton, J. Ceramic Soc. A reshaping operation involving only the surface of the glass preform and only partially through the thickness and wherein the overall shape of the preform throughout its breadth and width is unaltered. See Subclass References to the Current Class, above, for a subclass reference to the term "temper.

Skip header and go to main content About us Jobs Contact us. Classification Resources. Toggle navigation. CLASS 65 ,. Click here for a printable version of this file. Processes and apparatus. Static Structures e. The combination of reactive coating of metal with a glass working or treating operation is proper for Class However, the combination of a significant heat treatment to modify or maintain the internal physical property i.

A patent disclosing working of named materials for Class and Class 65 is classified in Class unless the only species claimed or the only specific example is glass in which case the patent is classified in Class The positive recitation of a glass working station in a claim, as such, does not constitute glass working means for Class The inclusion of the step of melting solid glass to the liquid state does not exclude the patent from Class A patent disclosing working or treating of named materials for Class and Class 65 is classified in Class unless the only species claimed is glass or the only specific example relates to glass in which case the patent is classified in Class A patent claiming a combined process for Class 65 and Class is classified in Class Class takes processes directed to 1 shaping a mass of green siliceous material and subsequently firing or curing the material to set the material or 2 placing discrete siliceous particles, other than glass fibers or mineral wool, onto a mold surface which particles are heated on or subsequent to contact with the surface to fuse the particles to each other.

A process directed to 1 heating a material within the scope of Class 65 to the molten state and forming a shaped preform therefrom or 2 bulk depositing glass fibers into a mold surface and thereafter fusing the fibers to each other is classified in Class A combined Class 65 and operation is classified in Class The original copy of a patent disclosing named materials for Class 65 and Class is classified in Class , unless the only species claimed is glass or the only specific example relates to glass, in which case the document is classified in Class A document claiming the combination of Class 65 and Class apparatus is classified in Class Apparatus for shaping powdered glass with means to heat subsequently to obtain fusion bonding is classified in Class ; however, apparatus shaping glass wool or mineral wool with subsequent fusion bonding is classified in Class The inclusion of the step of exhausting or providing a special atmosphere in the envelope is considered a lamp making operation for Class For other lamp making operations provided for in Class , see the class definitions of Class A Class operation combined with specific glass treating is placed in Class 65; however, mere recitation of "treating the glass", "annealing", or "tempering" by these words only is not enough to prevent placement in Class This subclass is indented under the class definition.

Processes of working or treating glass. This subclass is indented under subclass Processes wherein a sol-gel route or liquid phase route procedure is used during any stage of working or treating glass. Processes combined with a step of associating a mass of individual discrete particulate material and shaping said mass and either during or subsequent to the shaping operation, heating the material to effect fusing of the particles one to another. Processes claiming depositing particulate material into a mold cavity which its intended function is not to shape the mass of particles prior to fusing them but intended to shape a molten or plastic mass formed by heating the particles are classified elsewhere.

See search notes below. This subclass includes, for example, patents claiming a step of shaping a mass of glass particles which are fused together in a manner to preserve the shape of the mass of glass particles combined with a subsequent glassworking or treating operation e.

See the class definition of Class 65, particularly References to Other Classes and the notes to Classes and See also subclass 6 for processes under the class definition for forming solid particulate material directly from a molten or liquid mass other than glass with subsequent uniting of the formed particles; and subclass for processes directed to a uniting step not otherwise provided for.

Processes in which the particulate material is formed in a flame or particulate or fused material is contacted by a flame or gas to effect treatment thereof. Processes in which a nonoxide material which is generally not an ingredient of a glass composition is incorporated with the particulate material prior to fusing.

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701990 - Other Articles Nes - Glass Fibres - Canadian Importers Database (CID)

Account Options Fazer login. Estate and gift taxes. Motor carrier and motor common. Hedrings etc. See also Federal Aviation Admin. Employment of domestic service. Termos e frases comuns accordance action adjustment Administration agency agreement allocation amended amount appeal Applicant's application appropriate Authority Authority sought base period Board certification City Commission Committee common carrier Company copy County crude Department designated determine District East effective eliminate employee engine equipment established facilities Federal filed fuel gateway hearing Interstate issued June limited materials means meeting ment Michigan motor vehicle North notice October Office operate paragraph Patent percent period permit person petition points procedures proposed purchaser pursuant received REGISTER regulations representative request requirements revised rules Secretary September serve Service sought to operate South specified Street Sub-No Subpart supplier supply thence tion transporting U.

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Fused quartz or fused silica is glass consisting of silica in amorphous non- crystalline form. It differs from traditional glasses in containing no other ingredients, which are typically added to glass to lower the melt temperature. Fused silica, therefore, has high working and melting temperatures. Although the terms fused quartz and fused silica are used interchangeably, the optical and thermal properties of fused silica are superior to those of fused quartz and other types of glass due to its purity. It transmits ultraviolet better than other glasses, so is used to make lenses and optics for the ultraviolet spectrum.

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By the combination of a three-axis system to move the glass sample and a fast 3D system to move the laser focus, the SLE process is now suitable to produce more complex structures in a shorter time. Here we present investigations which enabled the new possibilities. We started with investigations of the optimum laser parameters to enable high selective laser-induced etching: surprisingly, not the shortest pulse duration is best suited for the SLE process. Secondly we investigated the scaling of the writing velocity: a faster writing speed results in higher selectivity and thus higher precision of the resulting structures, so the SLE process is now even suitable for the mass production of 3D structures. Finally we programmed a printer driver for commercial CAD software enabling the automated production of complex 3D glass parts as new examples for lab-on-a-chip applications such as nested nozzles, connectors and a cell-sorting structure. Pure transparent materials such as quartz glass fused silica glass can be processed to generate 3D structures in a subtractive 3D printing process similar to 3D lithography using the glass as positive-tone resist [ 1 ]. The exposure is executed by scanning focused ultrashort pulsed fs or ps laser radiation inside the glass changing its properties locally in the focal volume. The development is executed by subsequent wet-chemical etching an acid such as HF or an alkaline such as KOH or similar materials in water. Depending on the processing conditions, the etching rate of the laser-modified material can be much larger than the untreated glass, e.

Fused quartz

This application claims the benefits of U. The present invention relates to a glass composition and products made thereof, having very little variation in key properties within any given lot of the glass composition. In glass applications such as liquid crystal panels, optical communication devices for instance optical filters and optical switches, recording medium, halogen and High Intensity Discharge HID lamps etc. High-energy laser systems employ multiple large pieces of optical quality glass, sometimes thousands of large size laser glass pieces, and it is imperative for the pieces to have consistent optical quality.

The invention concerns a quartz glass body for an optical component for transmitting UV radiation with a wavelength of nm and less, in particular a wavelength of nm, as well as a process for the manufacture of the quartz glass body whereby fine quartz glass particles are formed by means of flame hydrolysis of a silicon compound, deposited and vitrified. Optical components of synthetic quartz glass are used in particular for the transmission of high energy UV laser radiation, for example in exposure optics of microlithographic apparatus for the manufacture of highly integrated circuits in semiconductor chips.

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The content of silica powder in the materials to be mixed is adjusted at least is easy to handle, and is suitable as a starting material for quartz glass products, The granulate is pressed into molded articles, which are then sintered at °° C. Prepared Silicon Dioxide, Method For Their Preparation And Use Thereof.

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The use of hazardous or toxic waste to make a glass material a useful product is provided for herein, however, vitrification of hazardous waste for purposes of containment is excluded, see References to Other Classes below. Included within the scope of the class definition are:. Search notes relating to a processes and apparatus and b products will be identified appropriately. Although silicon and silicon dioxide are arbitrarily considered to be glass materials for Class 65, a process of growing these polycrystalline materials is proper for Class 23, even though a rod is used as a bait, unless the shape formed is not a result of crystallization or deposition on the rod. Processes of growing single-crystal of all types of materials, including silicon or silicon dioxide, are proper for Class Although silicon and silicon dioxide are arbitrarily considered to be glass for Class 65, a process of, or apparatus for, growing crystals of these materials is placed in Class 23 for a process exception, see 5 Note in Class , subclasses 1. A patent claiming a Class 23 species of crystallization and a Class 65 species or having a multiple disclosure with generic claims only is classified in Class Class , Semiconductor Device Manufacturing: Process, for the combination of Class unit coating operation or Class unit etching operation with glass melting, shaping or forming, joining, or heat treating. Moreover, Class also takes the heat treating, per se, of Class semiconductor material if for purposes of modifying the electrical properties thereof.

US5082484A - Apparatus for making quartz glass crucibles - Google Patents

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Account Options Fazer login. United States. Patent Office. Termos e frases comuns actuating adapted adjacent adjustable apparatus arranged assignor attached base bearing blades block body bolt bottom carriage carried chamber character circuit Claims clamping closed combination comprising connected consisting containing controlling cover cylinder described device direction disposed driving edge electric element engaging extending face feed Filed fixed flange formed frame Gazette gear groove handle head holding inner latter lever located locking longitudinal lower machine material means mechanism metal motor mounted movable move movement normally opening operating opposite outer pair passage passing pipe pivotally plane plate plurality port portion position pressure printed projecting rail rear receive receptacle recess relatively respectively ring rotatable seat secured Serial shaft side sleeve slot spaced spring stem substantially supply surface switch therein thereof threaded tion tube upper valve vertical wall wheel whereby.

The invention pertains to a process for the production of silica granulate by mixing silicic acid powder with a liquid. Silica powders can be produced by means of gas-phase reactions such as by the hydrolysis of silicon halides or organic silicon compounds. They can also be produced by means of sol-gel processes. They are obtained in large amounts as a by-product of, for example, the production of synthetic quartz glass, but it is difficult to make profitable use of such powders.

Quartz glass crucibles are used to hold molten silicon during the growing of a silicon crystal rod. Such quartz glass crucibles are manufactured by an apparatus having a rotation table which reciprocally moves between a feeding and shaping station and a heating and fusing station. A predetermined volume of grain material is fed into one of the rotation crucibles and shaped by a shaping means so as to form a shaped body therein at the feeding and shaping station, while the shaped body in the other rotation crucible is heated and fused so as to form a quartz glass crucible therein at the heating and fusing station.

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