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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 6447679 | Hollow fiber membrane The present invention provides a gas-permeable hollow fiber membrane having an inner diameter of 50 to 500 μm, which is preferably a composite hollow fiber membrane having a three-layer structure consisting of a nonporous layer having porous layers dispo... | 09/10/2002 |
| 6206550 | Active energy ray-curable composition and lens sheet An active energy ray-curable composition comprising (A) 20 to 80 parts by weight of a compound represented by the following general formula I: ##STR1## wherein R1 represents hydrogen or methyl, X and Y may be the same or different and represent... | 03/27/2001 |
| 6103438 | Polyester resin for toner, process for its production and toner A polyester resin for toner comprising an acid component containing at least one selected from the group consisting of aromatic dicarboxylic acids and their lower alkyl esters, and an alcohol component containing at least one selected from the group consi... | 08/15/2000 |
| 6025441 | Polytetrafluoroethylene-containing powder mixture, thermoplastic resin compositions including same and molded articles made therefrom A polytetrafluoroethylene-containing powder mixture comprising polytetrafluoroethylene particles (A) with a particle size 10 μm or smaller and organic polymer particles (B), thermoplastic resin compositions containing it, and molded articles obtained the... | 02/15/2000 |
| 6007958 | Polyester resin for full color toner A polyester resin for a full color toner which comprises a) from 0.5 to 5% by mole, based on all the acid components, of a tribasic or higher carboxylic acid component and/or a trihydric or higher alcohol component, b) at least 95% by mole, based on all t... | 12/28/1999 |
| 5969867 | Active energy ray-curable composition and lens sheet An active energy ray-curable composition comprising (A) 20 to 80 parts by weight of a compound represented by the following general formula I: ##STR1## wherein R1 represents hydrogen or methyl, X and Y may be the same or different and repr... | 10/19/1999 |
| 5914380 | Toner resin and process for its production Toner resin consisting of a polymer which comprises (a) an aromatic vinyl unit, (b) an acrylic or methacrylic compound unit and (c) a polyfunctional compound unit, and which has a tetrahydrofuran insoluble content of 5-60%, a maximum peak molecular weight... | 06/22/1999 |
| 5889113 | Thermoplastic resin composition A resin composition, excellent in a physical property balance between chemical resistance and impact strength, obtained by mixing at least one graft copolymer selected from the group consisting of a graft copolymer in which a copolymer rubber of an alkyl ... | 03/30/1999 |
| 5872184 | Thermoplastic resin composition A resin composition, excellent in a physical property balance between chemical resistance and impact strength, obtained by mixing at least one graft copolymer selected from the group consisting of a graft copolymer in which a copolymer rubber of an alkyl ... | 02/16/1999 |
| 5807654 | Polyester resin for toner, process for its production and toner A polyester resin for toner comprising an acid component containing at least one selected from the group consisting of aromatic dicarboxylic acids and their lower alkyl esters, and an alcohol component containing at least one selected from the group consi... | 09/15/1998 |
| 5804287 | Acrylic film-laminated molded article and acrylic film An acrylic film with a thickness of 300 μm or less for acrylic-laminated injection molded articles, which comprises 0-10 parts by weight of a thermoplastic polymer (I) consisting mainly of methyl methacrylate and having a reduced viscosity exceeding 0.2 ... | 09/08/1998 |
| 5674962 | Toner resin A toner resin, comprising a styrene component, an acrylic acid ester component or methacrylic acid ester component or both, and a divinyl monomer component, the resin having a glass transition temperature of 50° to 68° C., a value of tan δ, which is th... | 10/07/1997 |
| 5653868 | Diverter and water purifier having same A water purifier includes a diverter which can be detachably attached to a water faucet to select a plurality of water passages and a filter cartridge which can be detachably attached to the diverter to purify a water to be supplied through the diverter. ... | 08/05/1997 |
| 5563227 | Mat thermoplastic resin composition and laminate therefrom, matting agent therefor, and method for matting thermoplastic resin Disclosed is a technology for providing a thermoplastic resin composition or resin laminate having an excellent mat property by using, as matting agent, a copolymer (B) prepared by polymerizing 0.5 to 80% by weight of a hydroxyalkyl (meth)acrylate having ... | 10/08/1996 |
| 5560994 | Mat thermoplastic resin composition and laminate therefrom, matting agent therefore, and method for matting thermoplastic resin Disclosed is a technology for providing a thermoplastic resin composition or resin laminate having an excellent mat property by using, as matting agent, a copolymer (B) prepared by polymerizing 0.5 to 80% by weight of a hydroxyalkyl (meth)acrylate having ... | 10/01/1996 |
| 5543463 | Mat thermoplastic resin composition and laminate therefrom, matting agent therefore, and method for matting thermoplastic resin Disclosed is a technology for providing a thermoplastic resin composition or resin laminate having an excellent mat property by using, as matting agent, a copolymer (B) prepared by polymerizing 0.5 to 80% by weight of a hydroxyalkyl (meth)acrylate having ... | 08/06/1996 |
| 5540874 | Cellulose solution for shaping and method of shaping the same A cellulose solution having excellent fluidity and formability is prepared by dissolving a cellulose composition containing a component (I) of cellulose having a polymerization degree of 500 to 1000, and a component (II) of at least one member selected fr... | 07/30/1996 |
| 5521252 | Acrylic multilayer polymer powder Acrylic multilayer polymer powders containing coagulated powders of emulsified latexes of acrylic multilayer polymers, which are suitable for drying methods using pressure dehydration extruders, etc, comprises not more than 40 wt % of a fine powder of a p... | 05/28/1996 |
| 5484494 | Amorphous alloy and method for its production An amorphous alloy which has a composition represented by the general formula (Fe1-a Coa)1-x-y-z Px Wy Mz (where 0.9ࣘa, 0.04ࣘxࣘ0.16, 0.005ࣘyࣘ0.05, 0ࣘzࣘ0.2, and M is one or mor... | 01/16/1996 |
| 5476791 | Process for producing optically active carboxylic acid amide N-(3-acetylthio-2-D-methylpropionyl)-L-proline useful as a precursor of captopril, one of antihypertensive agents, is prepared by allowing thioacetic acid to react with methyl methacrylate to prepare racetalc methyl 3-acetylthio-2-DL-methylpropionate, con... | 12/19/1995 |
| 5455174 | Process for the stereoselective esterification of ascorbic or erythorbic acids with long-chained enol esters An organic acid ester of ascorbic acid or erythorbic acid is produced by reacting ascorbic acid or erythorbic acid with an organic acid enol ester in an organic solvent with a solubility of ascorbic acid or erythorbic acid of more than 0.3% at 25° C. in ... | 10/03/1995 |
| 5448553 | Plastic hub containing a magnetic material and method of its manufacture An optical memory disk hub made essentially of from 7 to 55% by weight of a thermoplastic resin and from 45 to 93% by weight of magnetic powder and/or magnetic fiber.... | 09/05/1995 |
| 5407752 | Polyester resin A polyester resin comprising units of a dicarboxylic acid component composed mainly of an aromatic dicarboxylic acid or its ester forming derivative and a diol component composed mainly of ethylene glycol and an ethylene oxide adduct of a bisphenol compou... | 04/18/1995 |
| 5390274 | Distributed graded index type optical transmission plastic article and method of manufacturing same A distributed refractive index type optical transmission plastic article has a circular cross section of a radius r0 which is in a range of 0.4 to 0.6 mm. A refractive index distribution of the optical transmission article substantially approxi... | 02/14/1995 |
| 5371149 | Lubricant for thermoplastic resin which is a three stage polymer A lubricant for a thermoplastic resin, which is a three-stage polymer obtained by (A) polymerizing 80-100 w.t.% of methyl methacrylate and 0-20 w.t.% of other copolymerizable monomer so that the reduced viscosity ηsp/C of the obtained polymer is not high... | 12/06/1994 |
| 5362795 | Process for producing rubber-containing graft copolymer particles Rubber-containing graft copolymer particles having excellent powder properties are prepared by mixing, with 100 parts by weight (as solid content) of a slurry of a rubber-containing graft copolymer (A), 0.1 to 10 parts by weight (as solid content) of a ri... | 11/08/1994 |
| 5349017 | Polyvinyl chloride resin composition A polyvinyl chloride resin composition comprising (i) 100 parts by weight of a polyvinyl chloride resin and (ii) 2 to 40 parts by weight of a multi-stage copolymer obtained by polymerizing resin component formable monomers in the range of from more than 3... | 09/20/1994 |
| 5346952 | Blends of polyphenylene ether, aromatic vinyl resins and vinyl aromatic-vinyl heterocyclic monomer grafted butadiene based polymers Disclosed is a thermoplastic resin composition comprised of (A) 10-60 weight parts of a polyphenylene ether resin, (B) 20-70 weight parts of (b-1) an aromatic vinyl resin and/or (b-2) a copolymer of an aromatic vinyl monomer with a heterocyclic compound h... | 09/13/1994 |
| 5342722 | Toner resin composition and process for preparing same A toner resin composition comprising 5 to 40% by weight of a polyester (A) having a weight average molecular weight of 3,000 to 20,000 and 50 to 95% by weight of a styrene-acrylic copolymer (B). The styrene-acrylic copolymer (B) is comprised of 10 to 25% ... | 08/30/1994 |
| 5338804 | Methacrylic resin cast plate having transparency and impact resistance, and process for preparation thereof Disclosed is a methacrylic resin cast plate which is comprised of 100 parts by weight of [I] polymethyl methacrylate or a methyl methacrylate copolymer containing at least 90% by weight of methyl methacrylate units and, dispersed therein, a graft copolyme... | 08/16/1994 |
| 5314965 | Lubricant for thermoplastic resin and thermoplastic resin composition comprising said lubricant A lubricant for a thermoplastic resin, which is a three-stage polymer obtained by (A) polymerizing 80-100 w.t. % of methyl methacrylate and 0-20 w.t. % of other copolymerizable monomer so that the reduced viscosity ηsp/C of the obtained polymer is not hi... | 05/24/1994 |
| 5306763 | Process for the preparation of rubber-containing graft copolymer particles Rubber-containing graft copolymer particles excellent in powder properties are prepared by a process comprising mixing, with 100 parts by weight (as solid content) of rubber-containing graft copolymer (A) in a state of slurry, 0.1 to 10 parts by weight of... | 04/26/1994 |
| 5288825 | Fluoroacrylic polymer having lubricating effect and thermoplastic resin composition comprising same A fluoroacrylic polymer having a lubricating effect, which comprises at least one kind selected from units derived from a fluoroalkyl acrylate and units derived from a fluoroalkyl methacrylate as a part or all of structural units and a reducing viscosity ... | 02/22/1994 |
| 5284913 | Methacrylimide-containing polymer and thermoplastic resin composition comprising this polymer A methacrylimide-containing polymer comprising a polymer (A) comprised of 5-100 weight % of units represented by the formula (I): ##STR1## wherein R is H or a C1-20 hydrocarbon group, and 0-95 weight % of units derived from an ethylenic monomer, wher... | 02/08/1994 |
| 5282779 | Air jet for producing filter plug for cigarette An air jet for producing a filter plug for cigarette comprising an imparting portion for propelling force to a tow-like fiber bundle and a beak portion, wherein said imparting portion is constructed by a trumpet (21) having a converged tip end region, a t... | 02/01/1994 |
| 5276127 | Polyester resin for toner A polyester resin for a toner capable of being stably prepared without an occurrence of an abrupt crosslinking reaction is provided. This polyester resin has a crosslinked structure and is derived from (a) at least one member selected from the group consi... | 01/04/1994 |
| 5270436 | Polyester for electrophotography A polyester for electrophotography derived from (a) at least one component selected from tri- or tetra-basic acid components and tri- or tetra-hydric alcohols; (b) at least one component selected from dibasic carboxylic acids and lower alkyl esters thereof; an... | 12/14/1993 |
| 5258873 | Image-reading device An image-reading device comprises a lens unit array comprising an array of distributed refractive index plastic cylindrical lens elements and plastic plates, adhering the distributed refractive index plastic cylindrical lens elements therebetween, and a p... | 11/02/1993 |
| 5252195 | Process for producing a printed wiring board A process for the production of a printed wiring board, which comprises preparing a copper-clad laminate having a through-hole formed by drilling; providing a first resist pattern on the surface of the copper-clad laminate so as to cover a portion to be f... | 10/12/1993 |
| 5238974 | Plastic cladding composition for silica or glass core optical fiber, and silica or glass core optical fiber prepared therefrom Disclosed is a cladding composition suitable for a plastic clad silica or glass core optical fiber of a good light transmittance. The cladding composition comprises (A) a fluorinated monofunctional acrylate or -fluoroacrylate composition, (B) a pol... | 08/24/1993 |
