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4904421 |
Soft ocular lens and method for its preparation
A method for preparing a soft ocular lens, which comprises machining a machinably hard polymer blend body composed essentially of a soft lens material and a hard polymer into an ocular lens shape,...
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4900334 |
Process for treating a liquid-wet polycarbonate membrane to improve its gas separation properties
This invention relates to a method of treating liquid-wet polycarbonate membranes to improve gas separation properties.
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4900443 |
Porous aramid membranes and emulsions useful for the casting thereof
Fully aromatic polyamide (aramid) resins can be cast into ultraporous and microporous membranes by forming a solution of the resin in an amount sufficient to cast a coherent membrane, diluting the...
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4897294 |
Insulating material containing delaminated vermiculite
An asbestos-free insulating material suitable for use as a header in molten metal casting. The material is made from a dry mixture comprising lime, siliceous component, delaminated vermiculite or...
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4894194 |
Method for molding ceramic powders
A method for molding ceramic powders comprises forming a slurry mixture including ceramic powder, a dispersant for the metal-containing powder, and a monomer solution. The monomer solution includes...
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4892544 |
Methods for forming hollow, porous-surfaced elastomeric bodies
A method of forming hollow, porous elastomeric bodies and hollow, duo-layered elastomeric bodies wherein one layer is porous and contiguous with the other layer which is solid by (a) coating a...
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4874568 |
Process of making a porous membrane
A method for preparing porous membranes containing a homogeneous microporous structure and narrow pore size distribution which are useful for ultrafiltration, distillation and substrates for...
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4873034 |
Process for producing microporous ultra-high-molecular-weight polyolefin membrane
A process for producing a relatively thick microporous ultra-high-molecular-weight polyolefin membrane, including the steps of: (1) preparing a solution of an ultra-high-molecular-weight polyolefin...
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4872888 |
Microporous membrane filter and method of producing same
A process for producing a filter including a microporous membrane and a supporting structure connected thereto, including producing a mold for the membrane and the supporting structure, filling the...
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4873037 |
Method for preparing an asymmetric semi-permeable membrane
A method for preparing an asymmetric, semi-permeable membrane containing a uniform microporous structure for gas and liquid separation, including forming a dense separation on one major surface of...
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4871500 |
Process for providing a high-temperature resistant polyimide film
In a process of producing a high-temperature resistant film or a polyimide polymer, a solution of the polymer in an organic solvent is caused to flow out through a slots spinneret of a film forming...
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4871490 |
Method of manufacturing hydrogel dressings
A method of manufacturing hydrogel dressings from synthetic and natural polymers by polymerization and cross-linking involves pouring aqueous solutions of synthetic polymers, such as polyacrylamide...
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4871495 |
Process for producing porous ceramic filter for filtering of particulates from diesel exhaust gases
A process for producing a porous ceramic filter for use in the filtering of particulates from diesel exhaust gases, and the filter so produced, in which a foamable ceramic composition based upon an...
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4870147 |
Process for producing highly conductive polyacetylene film
A highly conductive polyacetylene film is obtained by orienting a catalyst-containing polyacetylene film or an essentially catalyst-free polyacetylene film which has been swelled in a solvent after...
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4868143 |
Methods of making ceramic articles with a modified metal-containing component
A method of producing self-supporting ceramic bodies having a modified metal-containing component includes first providing a self-supporting ceramic body comprising (i) a polycrystalline oxidation...
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4867662 |
Slip casting mold
A mold (1) for cast-molding a slip is provided, which comprises a divsible casting mold including a plurality of mold portions to form a mold cavity (4) when mated together; each mold portion...
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4865787 |
Method for the impregnation of filament wound structures with thermoplastic binders
Filament wound or dry lay-ups of structural shapes are impregnated with a binder of thermoplastic resin. Impregnation is achieve by adding a polymer solution to a centrifuge containing reinforcing...
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4865743 |
Method for production of solution-diffusion membranes and their application for pervaporation
For producing solution/diffusion membranes, homogeneous dense films prepared by melt extrusion or casting from synthetic polymers, having a melting temperature above 140° C., a glass transition...
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4859385 |
Method for making a furnace component
A method for making a component for a semi-conductor diffusion furnace by blending two types of silicon carbide powders, that is, 10 parts by weight of intermediate silicon carbide having an...
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4859383 |
Process of producing a composite macrostructure of organic and inorganic materials
A composite self-supporting flexible agglomerated macrostructure is described which includes (1) a matrix of unfibrillated polytetrafluoroethylene resin and addition curable silicone and (2)...
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4857632 |
Residue removal process
The present invention relates to a process to remove residue from partially hydrogenated nitrile rubber. The process is undertaken by mixing and kneading the rubber in the presence of an extractant...
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4854995 |
Delivery system of strippable extrusion coated films for medical applications
The present invention provides a process for producing a wound dressing delivery system. The wound dressing delivery system is formed by extruding first and second thermoplastic resins onto the...
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4855048 |
Air dried cellulose acetate membranes
The method of preparing dried asymmetric cellulose acetate blend membranes through the use of at least one drying agent which is a hydrophobic organic compound, such as polysiloxanes, hydrocarbons,...
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4849457 |
Method of producing plastic sheet with porous surface
A method of producing a plastic sheet with a porous surface layer suitable for use as, for example, a recording medium on which characters and images are printed by ink jet or thermal-transfer...
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4839392 |
Method for recovering a solid flowable polymer medium
A method of recovering a solid flowable polymer medium that is capable of being used as a pressurizing medium for high temperature molding from contaminants. A polymer mixture containing...
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4836965 |
Method of producing heat treating furnace member
A method of producing a high density and high strength silicon carbide member for a heat treatment furnace to be used in the manufacture of a semiconductor device. In this method, SiC powder,...
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4820463 |
Process of degassing and pelletizing polyolefins
The invention relates to a process for degassing and pelletizing polyolefin particles produced by a gas phase polymerization. The polyolefin particles are submitted to a primary degassing,...
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4820498 |
Method for producing substantially pure alumina material
A method for producing an alumina of high purity, which comprises forming an oxidation reaction product of an aluminum parent metal and an oxygen-containing vapor-phase oxidant, comminuting the...
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4820462 |
Method of removing binder material from shaped preform by extracting in liquidized fluid
There is provided a method of removing binding material from a shaped preform (green body) in the preparation procedure for the manufacture of ceramics from particulate materials by a new method...
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4808365 |
Method for reducing edge curl on green sheets
A process for reducing edge curl in green sheets in which the sheets are first placed in a chamber at about 95% relative humidity for a period of about 2 weeks at room temperature. In this part of...
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4795598 |
Method of making articles from sinterable materials
A method of binder removal from a green body before sintering or the like wherein the binder is constituted of a polymeric material or mixture which is degradable by thermo-oxidation and the green...
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4776995 |
Method of making a structure
A carbonizable body is formed by infusing a plurality of preoxidized, preferably stabilized by known processing to have about 9 to 14 weight percent oxygen, polyacrylonitrile fibers in a polar...
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4776994 |
Method of making a structure from carbonaceous fibers
A carbonizable body is formed by infusing a plurality of preoxidized, preferably stabilized by known processing to have about 17 to 30 weight percent oxygen, fibers prepared from pitch, in a...
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4774038 |
Polyamide membranes
A method for preparing an alcohol insoluble polymide membrane. An appropriate membrane-forming casting liquid containing the required polyamide is evaporated under conditions of high total humidity...
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4764323 |
Method of treating hollow articles, in particular polyethylene terephthalate preforms
A method of treating PET preforms and bottles consists of subjecting the preforms or the bottles to a carbon dioxide atmosphere at a higher temperature than the critical temperature of carbon...
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4753760 |
Process for preparing improved pellets of hydrolyzed ethylene-vinyl acetate copolymer
A process for preparing improved pellets of a hydrolyzed ethylene-vinyl acetate copolymer which comprises extruding a methanol or a water-methanol solution including a hydrolyzed ethylene-vinyl...
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4753763 |
Method of manufacturing heating furnace parts
A method of manufacturing heating furnace parts having high purity which comprises the steps of molding a raw powder mainly consisting of silicon carbide powder into a prescribed form, and...
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4746389 |
Method for producing a clean, highly conductive surface for mating composite articles
A method is disclosed for providing a clean, highly conductive mating surface in a composite panel which includes an embedded aluminum wire mesh to achieve lightning and electromagnetic...
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4743507 |
Nonspherical microparticles and method therefor
A method for producing nonspherical particles including those of prolate spheroidal, oblate spheroidal, and ellipsoidal shape is described. A microparticulate latex can be produced wherein the...
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4738764 |
Electrodialysis membranes comprising sulfonated constituents
Permselective membranes are disclosed which comprise a layer comprising polystyrene, at least a portion of which is sulfonated, and between about 10 wt. % and about 35 wt. % monovinyl...
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4737332 |
Method for removing the dispersion medium from a molded pulverulent material
A method for eliminating a dispersion medium from a molded product obtained by plasticizing-molding or casting-molding one or more of metallic and ceramic powders, wherein the elimination process...
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4720384 |
Manufacture of hollow fine tubular drug delivery systems
Pharmaceutical compositions are provided which contain hollow fine tube drug delivery systems. The compositions comprise a pharmaceutically suitable carrier, preferably in the form of a capsule,...
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4713206 |
Process for dewaxing ceramic molded bodies
A process for dewaxing a ceramic molded body is disclosed, the process includes heating an injection molded body made from ceramic material and a wax-series binder, said heating occurring upon a...
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4708838 |
Method for fabricating large cross section injection molded ceramic shapes
A method for fabricating large, greater than one centimeter cross section, high density silicon nitride by injection molding process has been developed. The method requires use of a controlled...
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4704242 |
Method for injection molding and removing binder from large cross section ceramic shapes
A method for fabricating injection molded ceramic shapes suitable for densification by sintering or hot isostatic pressing has been developed. The method is applicable to ceramic articles of large,...
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4687611 |
Process for drying polyimide film
Polyimide film prepared from a precursor solutions of polyamic acid in a solvent can be dried during or following the thermal or chemical conversion step, which produces a polyimide, by adding to...
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4671907 |
Method of manufacturing carbon materials
A method for the manufacture of high-strength, high-density carbon materials is disclosed. The method comprises the steps of pulverizing a carbonaceous raw material having a carbon content of at...
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4659528 |
Method of making an electrolyte-permeable, heterogeneous polymer sheet for a gas diffusion composite electrode
A gas diffusion composite electrode is disclosed which is suitable for use in combination with an electrically conductive current collector. The electrode comprises an electrochemically active,...
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4654099 |
Method of production of a non-skid laminated sheet
The present invention contemplates a method of manufacturing a laminated sheet having a non-skid surface. In a preferred embodiment a method of manufacturing a decorated unitary laminated tray...
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4639507 |
Process for the isolation of polyarylene sulphide
The isolation of polyarylene sulphides by freeing polyarylene sulphides of the type obtained in customary production processes from adherent water and any other volatile constituents by treating...
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