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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 |
| 8076446 | Optical layered body and method for producing optical layered body An optical layered body having an excellent antistatic property and adhesion is provided. An optical layered body is provided that comprises an antistatic layer and a hard coat layer formed in sequence on a light transmitting substrate, wherein in the cross-sectiona... | 12/13/2011 |
| 8017713 | Production apparatus of polycarbonate resin and production method of polycarbonate resin An apparatus of a polycarbonate resin having polymerization tanks is provided. In supplying a molten reactant to a liquid phase in a polymerization tank, or supplying the molten reactant to a gas phase in the polymerization tank by an insertion pipe, in at least one... | 09/13/2011 |
| 7923525 | Polyester resin and fabrication method thereof A polyester resin and a fabrication method thereof are provided. The fabrication method includes providing a diphenol monomer and a diacid monomer. The diphenol monomer is acetylated and then melt pre-polymerized with diacid monomer to form a pre-polymer. Then, the ... | 04/12/2011 |
| 7709592 | Process for preparing polyestercarbonates Processes for preparing polyestercarbonates are disclosed. The processes allow for the consistent incorporation of adipic acid into a polymer generated from a dihydroxy compound, such as bisphenol-A, at levels greater than 99%. The polyestercarbonates so produced, a... | 05/04/2010 |
| 7576171 | Pacifiers comprising polyester compositions formed from 2,2,4,4-tetramethyl-1,3-cyclobutanediol and 1,4-cyclohexanedimethanol Described are pacifiers comprising polyester compositions comprising polyesters which comprise (a) a dicarboxylic acid component having terephthalic acid residues; optionally, aromatic dicarboxylic acid residues or aliphatic dicarboxylic acid residues or ester resid... | 08/18/2009 |
| 7528210 | Method of purification of dihydric phenols A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A; contacting the solution A with a zeolite; filtering the zeolite to form a solution B; adding an anti-solvent to the solution B to form a solution C; and distilling the ... | 05/05/2009 |
| RE40508 | Thermally stable polymers, method of preparation, and articles made therefrom Thermally stable polymers comprising resorcinol arylate chain members are prepared using an interfacial method comprising the steps of: (a) combining at least one resorcinol moiety and at least one catalyst in a mixture of water and at least one organic solvent subs... | 09/16/2008 |
| 7425603 | Polymers, polymer compositions, and method of preparation A polymer comprising structural units derived from a polycyclic dihydroxy compound of Formula (I) wherein R1, R2 and R3 are independently at each occurrence selected from the group consistin... | 09/16/2008 |
| 7408018 | Elastomeric functional biodegradable copolyester amides and copolyester urethanes The invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers are based on α-amino acids and possess physical, chemical and biodegradation properties that render them suitable for use in the ... | 08/05/2008 |
| 7402650 | Process for preparing polyarylate having high thermo-resistance and high transparency A process for preparing polyarylate wherein a bivalent phenol compound having the structure of Formula 1 and an aromatic dicarboxylic acid halogen compound react to prepare a polyarylate, and wherein a nonionic surface-active agent is added. This decreases residual ... | 07/22/2008 |
| 7399799 | Flame-retardant polyester polymer dyeable with cationic dye, method of producing the same, and copolyester fiber using the same Disclosed is a flame-retardant polyester polymer dyeable with a cationic dye, a method of producing the same, a copolyester fiber using the same, and fiber products using the copolyester fiber. In the method, after a dimethyl isophthalate component containing metal ... | 07/15/2008 |
| 7375178 | High refractive index thermoplastic polyphosphonates High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection moldin... | 05/20/2008 |
| 7368169 | Hydrazide compounds with angiogenic activity Compounds exhibiting angiogenic properties incorporating the structure of Formula I: R3—NH—NH—C(═O)—R2—P—R1 (I) wherein P is a water-soluble, biodegradable polymer, R1 is hydrogen, l... | 05/06/2008 |
| 7368216 | Photosensitive resin composition and manufacturing method of semiconductor device using the same A positive photosensitive resin composition, which contains a polybenzoxazole precursor, a quinonediazide photosensitizer and a carbonate solvent, and a method of manufacturing a semiconductor device using the composition. ... | 05/06/2008 |
| 7368521 | Method of producing modified polycarbonate using spray-crystallizing method Provided is a method of producing a high-molecular weight modified polycarbonate resin. The method includes a melt condensation polymerization process in which transesterification and quick condensation polymerization are sequentially performed, a spray crystallizat... | 05/06/2008 |
| 7361445 | Positive-working photosensitive resin composition, method for producing pattern-formed resin film, semiconductor device, display device, and method for producing the semiconductor device and the display device A positive-working photosensitive resin composition containing an alkali soluble resin (A), a diazoquinone compound (B) and a compound (C) which contains a —CH2OH group but not a phenolic hydroxyl group, a method for producing a pattern-formed resin fil... | 04/22/2008 |
| 7358323 | Water-soluble flame-retardant polyester resin, resin composition containing the resin, and fiber product treated with the resin composition A water-soluble, flame retardant polyester resin is obtained by a condensation reaction or a polycondensation reaction of a dicarboxylic-acid component, a glycol component, a water-solubility imparting component and a reactive phosphorus-containing compound such tha... | 04/15/2008 |
| 7354887 | High temperature LCP for wear resistance A high temperature liquid crystalline polyester (LCP) composition, and articles made therefrom, that provides “good” to “excellent” wear resistance at PVs (pressure×velocity) of at least 1.75 MPa-m/s (50,000 psi-fpm). The high temperature LCP being a matrix... | 04/08/2008 |
| 7351786 | Polyhydroxyalkanoate containing unit having cyclohexyl structure at side chain, production process therefor, and binder resin containing polyhydroxyalkanoate Disclosed are a polyhydroxyalkanoate, containing in a polymer molecule thereof a monomer unit represented by the following general formula (1): (wherein R1 represents a substituent to a cyclohexyl group, where R1 is a H ato... | 04/01/2008 |
| 7347955 | Heat conducting polymer mold products A mold product comprising liquid crystal composition for conducting heat. The liquid crystal composition contains liquid crystal polymer having an orientation degree α obtained by equation 1 below: Orientation degree α=(180−Δβ)/180 equation 1 | 03/25/2008 |
| 7345139 | Polyester process using a pipe reactor The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar... | 03/18/2008 |
| 7342050 | Method for preparing a lactic acid ester composition and use thereof as solvent The invention concerns a method for preparing a lactic acid ester composition based on a lactic acid composition involving a step of transforming the composition into a lactic acid oligomeric composition having a mean degree of polymerisation (DPM) ranging between 2... | 03/11/2008 |
| 7341675 | Liquid crystalline polymer composition Liquid crystalline polymers containing specified ratios of repeat units derived from hydroquinone, 2,6-naphthalenedicarboxylic acid, 4-hydroxybenzoic acid and optionally terephthalic acid have exceptionally high heat distortion temperatures, making especially useful... | 03/11/2008 |
| 7335347 | Methods for purifying radiolabelled compounds One aspect of the present invention relates to a method of purifying radiolabelled compounds comprising a) loading onto a fluorous polymer a radiolabelled compound precursor comprising a fluoroalkyl tin moiety; b) reacting the radiolabelled compound precursor with a... | 02/26/2008 |
| 7332559 | Method of preparing polycarbonate resin A method of preparing a high molecular weight polycarbonate resin is provided. In the method, a condensation polymerization process is used so that a mole fraction of arylcarbonate existing in a terminated group of a reaction side product having a degree of polymeri... | 02/19/2008 |
| 7317066 | Liquid crystal polymers Liquid crystal polyester derived from phenylene-naphthalene monomers and one or more comonomers display an improved balance of properties, including low melt viscosity, fast cycle time in molding, very low mold shrinkage, high tensile and/or flexural strength, solve... | 01/08/2008 |
| 7317065 | Method for producing highly functional, hyper branched polyester by means of enzymatic esterification The present invention provides a highly functional hyperbranched polyester which may be obtained by a process which comprises reacting a reaction solution containing solvent and reactants in the presence of an enzyme at a temperature above 60° C. and a pressure abo... | 01/08/2008 |
| 7309756 | Methods for converting linear polyesters to macrocyclic oligoester compositions and macrocyclic oligoesters Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a comp... | 12/18/2007 |
| 7304121 | Liquid-crystalline polyester resin and method for producing it The present invention provides a liquid-crystalline polyester obtainable by a method comprising the steps of: (1) preparing a prepolymer consisting of the repeating units represented by formulae (I), (II), (III) and (IV): ... | 12/04/2007 |
| 7304122 | Elastomeric functional biodegradable copolyester amides and copolyester urethanes The present invention provides elastomeric copolyester amides, elastomeric copolyester urethanes, and methods for making the same. The polymers that are based on α-amino acids and possess suitable physical, chemical and biodegradation properties. The polymers are u... | 12/04/2007 |
| 7301000 | Nucleating agents for polyhydroxyalkanoates The present invention provides a process for crystallizing a polymer having at least 20 mole percent of hydroxyalkanoate repeat units, comprising admixing the polymer and a compound of the formula R1—C(O)N(R2)2, R1—C(O... | 11/27/2007 |
| 7291435 | Toner binder for electrophotography and toner for electrophotography The present invention provides a toner binder for electrophotography which comprises a polyester resin constituted of an alcohol component containing a polyoxyalkylene ether (A) of a bisphenol and an acid component, and the content of unreacted bisphenols in said po... | 11/06/2007 |
| 7291182 | Gel and cushioning devices Articles of apparel for an amputee's residuum and for non-amputees who desire or require padding or joint support. ... | 11/06/2007 |
| 7279594 | Thermoplastic composition, articles thereof, and method of making the articles A thermoplastic composition comprises greater than or equal to about 60 wt. % polycarbonate; and about 10 wt. % to about 40 wt. % of a polyimide; wherein weight percents are based on a total weight of the thermoplastic composition. ... | 10/09/2007 |
| 7271234 | Polyarylates for drug delivery and tissue engineering Biocompatible polyarylates of tyrosine-derived diphenol compounds and poly(alkylene oxide) dicarboxylic acids, articles formed therefrom and therapeutic uses are disclosed. ... | 09/18/2007 |
| 7271235 | Branched aromatic polycarbonate and its production method It is to provide a branched aromatic polycarbonate excellent in hue and excellent in melt properties such as melt strength. A branched aromatic polycarbonate obtained by transesterification and having a viscosity average molecular weight of at least 16,000, w... | 09/18/2007 |
| 7264707 | Corrosion inhibitor materials for use in combination with cathodic protectors in metallic structures A corrosion inhibitor composition for use in combination with cathodic protection of metallic structures includes between about 5 and 80 percent by weight cyclohexylammonium benzoate; between about 1 and 10 percent by weight monoethanolammonium benzoate; between abo... | 09/04/2007 |
| 7264913 | Antireflective compositions for photoresists The present invention relates to a novel antireflective coating composition comprising a polymer, a crosslinking agent and an acid generator. The present invention further relates to a process for using the novel composition, particularly at 193 nm. The polymer of t... | 09/04/2007 |
| 7256162 | Fatty acid esters and uses thereof Esters formed from polyol, C12-C28 branched chain fatty acid, and/or C12-C28 cyclic fatty acid are useful as a friction modifier for lubricants. Monomer is a preferred source for these fatty acids. ... | 08/14/2007 |
| 7256250 | Biodegradable coating The object of the present invention is a biodegradable polymer network and methods to make it. The polymer network consists of a cross-linked polyester resin, which is composed of hydroxy acid units, structural units derived from an unsaturated bifunctional monomer,... | 08/14/2007 |
