Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 6780361 | Process of making polymer articles A method including forming a pseudo-gel of a semi-crystalline polymer material and a solvent. The pseudo-gel is shaped into a first form and stretched. A portion of the solvent is removed to create a second form. The second form is stretched into a microstructure in... | 08/24/2004 |
| 6767598 | Low DP food casing from high solids viscose A tubular food casing of a tubular cellulose film precipitated from a viscose solution having a viscosity of from about 55 to about 90 ball seconds, where the ball has a density of 8 g/cc and a radius of 0.316 centimeters at a drop of 20 centimeters, and where the s... | 07/27/2004 |
| 6558591 | Process of making microporous film A microporous film of polyethylene having an intrinsic viscosity above 5 dl/g is prepared from a homogeneous solution in an evaporable solvent. The film is cooled and evaporable solvent is evaporated at a temperature below the dissolution temperature. The... | 05/06/2003 |
| 6218441 | Melt-spun polysulfone semipermeable membranes and methods for making the same The present invention discloses, inter alia, a composition useful for producing a homogeneous, semipermeable membrane, the composition comprising (1) a polysulfone compound, (2) a solvent, such as sulfolane, antypyrine, δ-valerolactam, diethyl phthalate,... | 04/17/2001 |
| 6153133 | Method of producing highly permeable microporous polyolefin membrane A method for producing a highly permeable microporous polyolefin membrane including the steps of preparing a polyolefin solution containing 5-40 weight % of a polyolefin or a polyolefin composition and 95-60 weight % of a solvent, the polyolefin having a ... | 11/28/2000 |
| 6147167 | Process for producing polyethylene film composition having broad molecular weight distribution and improved bubble stability A process for producing a polyethylene film composition, comprising melt extruding a linear copolymer of ethylene and at least one other olefin having from 3 to 8 carbon atoms, said linear copolymer having a bimodal distribution comprising a high molecula... | 11/14/2000 |
| 6123885 | Process for the production of elastane fibers by inclusion of a combination of PDMS and ethoxylated PDMS in the spinning solution The invention relates to a spinning process, more particularly a dry spinning process, for the production of elastane fibers in which 0.8 to 2% by weight of polydimethylsiloxane with a viscosity of 50 to 300 cSt and 0.2 to 0.6% by weight of ethoxylated po... | 09/26/2000 |
| 6113842 | Method of making blown films of cellulose The invention is directed to a method of manufacturing oriented cellulose films by spinning non-derivated cellulose dissolved in amino oxides into a precipitating bath. The cellulose solution is extruded downward through a film-blowing nozzle and an exter... | 09/05/2000 |
| 6096258 | Method and apparatus for forming a cellulose article including solvent recovery means A method and apparatus is disclosed for forming a cellulose film suitable for direct food contact by precipitation from a solution of cellulose water and a tertiary amine oxide cellulose solvent. After precipitation of a cellulose gel from the solution, t... | 08/01/2000 |
| 5962598 | Polyethlene film composition having broad molecular weight distribution and improved bubble stability A polyethylene film composition characterized as having a broad molecular weight distribution, Mw/Mm 15, a density of 0.920 to 0.970 g/cc, a melt flow index (190° C./2.16 kg) of 0.01 to 0.2 g/10 min., the polyethylene film composition being produced by m... | 10/05/1999 |
| 5942167 | Method of making a cellulose food casing including solvent recovery Disclosed is a method of extruding a solution of cellulose and an amine oxide cellulose solvent as a tube about a sizing mandrel which diametrically stretches the extruded tube. An aqueous poly(ethylene oxide) solution is introduced into the interior of t... | 08/24/1999 |
| 5888434 | Process for making a microporous membrane from a blend containing a poly (phenylene sulfide) polymer, an amorphous polymer, and optionally a solvent The invention relates to a process for preparing a microporous membrane from an unsulfonated poly(phenylene sulfide) polymer by forming a mixture of an unsulfonated poly(phenylene sulfide) polymer, an amorphous polymer, and optionally a plasticizer, heati... | 03/30/1999 |
| 5811162 | Sheet-like or tubular food casing based on cellulose hydrate A food casing based on cellulose hydrate, which is preferably used as a sausage casing, in addition to cellulose hydrate, includes a copolymer having units of methyl vinyl ether and maleic acid and/or alkali metal maleate. It can additionally contain furt... | 09/22/1998 |
| 5759678 | High-strength porous film and process for producing the same The present invention relates to a high-strength porous film or sheet consisting essentially of a high-molecular-weight polyethylene resin having a viscosity-average molecular weight of not less than 300,000, wherein the said film has a thickness of 5 to ... | 06/02/1998 |
| 5753169 | Method of after-treatment of modified polyolefins The amount of impurities contained in a modified polyolefin obtained by means of melt-kneading grafting is reduced by melt-kneading the modified polyolefin in the presence of water. A melt-kneading machine having a vent port is typically used in this proc... | 05/19/1998 |
| 5683634 | Process of making porous films or sheets A porous film or sheet including a resin composition mainly of an ultra-high molecular weight polyethylene having a viscosity-average molecular weight of not less than 500,000, and having a thickness of 10 to 100 μm, an air permeability of 20 to 2,000 se... | 11/04/1997 |
| 5677360 | Hydrophilic polymer alloy, fiber and porous membrane comprising this polymer alloy, and methods for preparing them A hydrophilic polymer alloy which has a permanent hydrophilic nature, a sufficient mechanical strength and a high safety and which is suitable for the formation of hydrophilic porous membranes manufacturable by an industrially advantageous process can be ... | 10/14/1997 |
| 5645778 | Process of making a cellulose acetate semipermeable membrane Methods are disclosed for making semipermeable membranes from cellulose acetate and for making medical devices therefrom. In the process, a molten liquid comprising cellulose acetate (CA), a solvent for CA, and a non-solvent for CA is extruded to produce ... | 07/08/1997 |
| 5626805 | Process of making vinylidene fluoride porous membrane A method of making a polyvinylidene fluoride porous membrane having an asymmetric structure, excellent mechanical strength and a narrow range of pore diameter distribution comprises: blending (i) 100 parts by weight of a vinylidene fluoride resin having a... | 05/06/1997 |
| 5589125 | Process of and apparatus for making cellulose mouldings To prepare cellulose mouldings, a solution of cellulose in a tertiary amine-oxide is moulded in a hot state and the moulded solution is introduced into a precipitation bath in order to precipitate the contained cellulose, wherein the hot moulded solution ... | 12/31/1996 |
| 5370930 | Laminated polyester film A polyester film having a coating layer provided with excellent mold release property, slipperiness, heat resistance and flatness is disclosed. The laminated polyester film is prepared by applying at least on one surface of a polyester film an aqueous solution... | 12/06/1994 |
| 5356584 | Polybenzazole fibers with ultra-high physical properties and method for making them A process for making PBZ fibers of ultra-high physical properties is given. Polybenzoxazole fibers made by the process of this invention have tensile strengths nearly double in value from what has been reported previously.... | 10/18/1994 |
| 5275766 | Method for making semi-permeable polymer membranes A method for making a semi-permeable microporous polymer sheet, useful as a separation membrane or the like, including extruding a melt-blended mixture of a high-temperature thermoplastic polymer and a leachable glass to form sheet and then leaching the g... | 01/04/1994 |
| 5246647 | Process of making microporous hollow fiber or film membrane of poly(phenylene sulfide) (PPS) The present invention relates to a process for preparing a microporous permselective membrane from a poly(phenylene sulfide) (PPS) polymer, an organic compound which substantially solubilizes the PPS below its melting point to form a homogenous mixture, h... | 09/21/1993 |
| 5227101 | Process of making microporous membranes from poly(etheretherketone)-type polymers and low melting point crystallizable polymers The invention relates to a process for preparing a microporous membrane from an unsulfonated poly(etheretherketone)-type polymer by forming a mixture of an unsulfonated poly(etheretherketone)-type polymer, a low melting point crystallizable polymer, and a... | 07/13/1993 |
| 5213740 | Processes for the preparation of toner compositions A process for the preparation of particles which includes adding to a melt mixing apparatus at least two polymers, at least one of which is insoluble, incompatible or immiscible in the other polymer or polymers, and separating the incompatible polymer fro... | 05/25/1993 |
| 5205968 | Process for making a microporous membrane from a blend containing a poly(etheretherketone)-type polymer, an amorphous polymer, and a solvent The invention relates to a process for preparing a microporous membrane from an unsulfonated poly(etheretherketone)-type polymer by forming a mixture of an unsulfonated poly(etheretherketone)-type polymer, an amorphous polymer, and a plasticizer, heating ... | 04/27/1993 |
| 5178812 | Method of making composites having improved surface properties Polymeric composite materials having a decreasing concentration gradient of polymer matrix from the material's surface to the material's interior. The composite is produced by a process whereby polymer matrix is extracted from the interior of the material... | 01/12/1993 |
| 5102601 | Process for fabricating novel compostes based on reinforcement with microfibrillar networks of rigid-rod polymers A process for fabricating a composite in the form of a network of microfibrils which includes interpenetrating the microfibrils with a matrix material to form a composite which includes two continuous interpenetrating phases, a matrix-material phase and a... | 04/07/1992 |
| 5096640 | Method of producing porous hollow fibrous tubes A method of producing a highly porous melt spun fibrous tube for use as a separation medium comprising melt spinning a blend containing from 30 to 70 parts by weight of a first polymeric component and from 70 to 30 parts by weight of a second polymeric co... | 03/17/1992 |
| 5066755 | Novel irradiated polyethylene filaments tapes and films and process therefor Novel gel-spun, irradiated and drawn ultra high strength high molecular weight and at least partially cross-linked and/or branched polyethylene filaments, tapes and films, exhibiting a combination of substantially lower creep rates, very high heat shrink ... | 11/19/1991 |
| 5064580 | Process for making microporous membranes from poly(etheretherketone)-type polymers A method of preparing a microporous membrane from unsulfonated poly(etheretherketone)-type polymers.... | 11/12/1991 |
| 5057261 | Process for producing modified ultrahigh-molecular-weight polyolefins A process for producing a modified ultrahigh-molecular-weight polyolefin composition, which comprises mixing a powder of an ultrahigh-molecular-weight polyolefin (A) having an intrinsic viscosity of at least 5 dl/g, a flowability improver (B) having a mel... | 10/15/1991 |
| 5049338 | Method of promoting sol gel siliceous-containing reactions A sol gel reaction process for forming glassy articles involves the hydrolysis of silicon alkoxides with or without additional dispersions of hydrated silicon oxides, and polymerization including crosslinking. The present process involves forming glassy a... | 09/17/1991 |
| 5043112 | Process for forming articles comprising poly(phenylene sulfide) (PPS) The present invention pertains to a process for the production of an article comprising a polymer itself comprising poly(phenylene sulfide), which process comprises: A. contacting poly(phenylene sulfide) with at least one organic compound, consisting esse... | 08/27/1991 |
| 5032338 | Method to prepare high strength ultrahigh molecular weight polyolefin articles by dissolving particles and shaping the solution A method to prepare high strength high modulus polyolefin shaped articles comprising forming a heated solution of the polyolefin from particles of which about 75 to 100% by weight have a particle size of from about 100 to about 400 microns and having a we... | 07/16/1991 |
| 5011637 | Preparing cellulose ester membranes for gas separation This invention relates to a novel composition useful for preparing a semi-permeable cellulose ester gas separation membrane, which composition includes a mixture of a cellulose ester, a solvent selected from the group consisting essentially of glycerol ac... | 04/30/1991 |
| 5011643 | Process for making oriented, shaped articles of para-aramid/thermally-consolidatable polymer blends A process for making oriented, shaped articles of para-aramid/thermally-consolidatable polymer blends by orienting spinnable dopes containing 10 to 25% by weight fiber-forming polymers being at least about 55% and less than about 80% para-aramid and at le... | 04/30/1991 |
| 5000898 | Process for making oriented, shaped articles of lyotropic polysaccharide/thermally-consolidatable polymer blends A process for making oriented, shaped articles of lyotropic polysaccharide/thermally-consolidatable polymer blends by orienting spinnable dopes containing fiber-forming polymers being at least about 55% and less than about 80% lyotropic polysaccharide and... | 03/19/1991 |
| 4971744 | Two-stage process for preparing aromatic polyamide film A process for preparing aromatic polyamide film wherein an aromatic diamine and an aromatic diacidchloride are dissolved in an amide polymerization solvent containing an inorganic salt, a partial polymerization is effected at a low temperature to form an ... | 11/20/1990 |
