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.
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7750090 | Moleculary imprinted polymers for extraction of components from foodstruffs The present invention relates to a novel class of water compatible molecularly imprinted polymers (AquaMIPs) capable of selectively binding target molecules such as riboflavin, or analogues thereof, in water or aqueous media, their synthesis and use thereof in food ... | 07/06/2010 |
| 7427644 | Water based adhesive An adhesive composition of between 10-70% by weight of a latex emulsion, between 30-80% by weight of an acrylic, between 0.05-5% by weight of a surfactant, and between 1-50% by weight of water, and an adhesive application system for applying the adhesive composition... | 09/23/2008 |
| 7312281 | Anhydrous, liquid phase process for preparing hydroxyl containing polymers of enhanced purity An anhydrous, liquid phase process for preparing hydroxyl containing polymers of enhanced purity comprising the steps of polymerization, purification, transesterification, purification, catalyst removal, and solvent exchange. The resultant polymer in solution can be... | 12/25/2007 |
| 7291681 | Polyisobutenamines Polyisobutenamines of the formula I: R—X (I) where R is a polyisobutenyl radical having a number average molecular weight Mn of from 500 to 1500 and a polydispersity Mw/ Mn of less than... | 11/06/2007 |
| RE39617 | Butadiene polymers having terminal functional groups Hydrogenated butadiene polymers having terminal functional groups have minimum viscosity at any molecular weight when the 1,2-addition is between 30% and 70% Hydrogenated butadiene polymers having about two terminal hydroxyl groups per molecule have surprisingly low... | 05/08/2007 |
| RE39559 | Butadiene polymers having terminal functional groups Hydrogenated butadiene polymers having terminal functional groups have minimum viscosity at any molecular weight when the 1,2-addition is between 30% and 70%. Hydrogenated butadiene polymers having about two terminal hydroxyl groups per molecule have surprisingly lo... | 04/10/2007 |
| 7163982 | Process for preparing fluorine-containing polymer and method of forming fine pattern using same There is provided a method of forming a fine pattern by using a practicable fluorine-containing polymer which has a high transparency to exposure light having a short wavelength such as F2 laser and can undergo resolution of a fine pattern. The method com... | 01/16/2007 |
| 7151141 | Stabilized fluorine-containing polymer and method for stabilizing fluorine-containing polymer To a fluorine-containing polymer, 0.1 to 10% of a compound having an alkali metal or an alkaline earth metal in terms of the number of atoms of the alkali metal or the alkaline earth metal based on the total number of the above terminal groups, 0.1 to 10% of ammonia... | 12/19/2006 |
| 7098271 | Thermally cross-linked fluoropolymer Melt-fabricable thermoplastic fluoropolymer having pendant functional groups is thermally cross-linked in the presence of polyfunctional nucleophile. ... | 08/29/2006 |
| 7094838 | Fluorine-containing polymer powder and method for production thereof and coated article A stabilized fluorine-containing polymer powder having an average particle size of 5 to 100 μm is prepared by contacting a fluorine-containing polymer powder, which is prepared by milling the fluorine-containing polymer and removing fine particles, fibrous particle... | 08/22/2006 |
| 6864324 | Anhydrous, liquid phase process for preparing hydroxyl containing polymers of enhanced purity An anhydrous, liquid phase process for preparing hydroxyl containing polymers of enhanced purity comprising the steps of polymerization, purification, transesterification, purification, catalyst removal, and solvent exchange. The resultant polymer in solution can be... | 03/08/2005 |
| 6855776 | Amino-terminated polybutadienes Improved amine-terminated polybutadienes (ATPBs) having one or two terminal groups of the formula —CHRNH2 wherein R is C1-C20 alkyl, are prepared by aminating a secondary hydroxyl-terminated polybutadiene having no ether groups. Th... | 02/15/2005 |
| 6841592 | Waterfastness additives for aqueous jet inks Cationic mordants are described that will not significantly interact with anionic dyes in aqueous jet inks, but will form strong complexes with the dyes on the substrate as the water is absorbed and dissipated. The mordants are cationic amide salts of maleated hydro... | 01/11/2005 |
| 6841625 | Nitrile group-containing fluoroelastomer and preparation process of same To provide a solid fluoroelastomer having nitrile group at the, end which gives a crosslinked product being excellent in heat resistance, solvent resistance, chemical resistance, compression set and cleanliness, and an economical process for preparation thereof. The... | 01/11/2005 |
| 6838530 | Method of preparing various multifunctional materials using limited starting reactants The invention provides a method of making a number of different multifunctional acrylic materials from a limited number of starting materials. The method of the invention requires the product of a masterbatch of an acrylic oligomer or polymer having two or more cycl... | 01/04/2005 |
| 6835782 | Method for curing fluoropolymer A polymer having a structure of the formula: in which X, Y and Z represent independently each other H, F, Cl, Br or I, provided that at least one of X, Y and Z is F; R represents a straight or branched fluorinated alky... | 12/28/2004 |
| 6825286 | Method for determining the water solubility or water dispersibility of waterborne beta-hydroxy primary carbamate functional graft materials The invention relates to a method of making waterborne multifunctional materials, especially waterborne multifunctional materials comprising at least one primary carbamate group and a grafting moiety (cii). The method of the invention requires the successive or simu... | 11/30/2004 |
| 6812300 | Method for making multifunctional materials The invention relates to a method of making multifunctional materials, especially materials comprising at least one primary carbamate group and a grafting moiety (cii). The method of the invention requires the successive or simultaneous reactions of a material P wit... | 11/02/2004 |
| 6777501 | Stabilized fluorine-containing polymer and method for stabilizing fluorine containing polymer To a fluorine-containing polymer, 0.1 to 10% of a compound comprising an alkali metal or an alkaline earth metal in terms of the number of atoms of the alkali metal or the alkaline earth metal based on the total number of the above terminal groups, 0.1 to 10% of amm... | 08/17/2004 |
| 6712978 | Process for manufacturing an adsorbent for reducing the concentration of fibrinogen and/or fibrin, an adsorbent and method of producing an adsorber from the adsorbent A process for manufacturing an adsorbent for reducing the concentration of fibrinogen and/or fibrin in blood or blood plasma in which a carrier material, which is preferably a copolymer derived from (meth)acrylates and or (meth)acrylic acid amides, is activated by a... | 03/30/2004 |
| 6667349 | Method for producing osmotically and mechanically stable gel-like anion exchangers The present invention relates to a process for preparing gel-like anion exchangers by aminating crosslinked gel-like styrene divinybenzene bead polymers that contain halogenoalkyl groups in the presence of an inorganic salt and in the absence of organic s... | 12/23/2003 |
| 6649703 | Cross-linked sulphonated polymers and their preparation process The present invention is concerned with cross-linked sulfonated polymers, eventually perfluorinated, and their preparation process. When molded in the form of membranes, the polymers are useful in electrochemical cells, in a chlorine-sodium electrolysis p... | 11/18/2003 |
| 6632871 | Crosslinkable elastomer composition, sealing material produced from said composition and filler used therefor The metal oxide filler of titanium oxide or silicon oxide for the crosslinkable elastomer composition which has a pH value of from 5.0 to 11.0 and contains impurity metals other than the essential metal of the filler in an amount of not more than 10,000 p... | 10/14/2003 |
| 6583231 | Process to make aminated polyolefins The invention relates to a process to make aminated polyolefins involving the steps of: ozonolysis of one or more low-molecular weight polyolefins with at least one end group that is unsaturated, in the presence of an alkanol-hydrocarbon mixture, to form ... | 06/24/2003 |
| 6566549 | Continuous polymerization process and products therefrom A continuous process for oligomers which do not contain, as polymerized units, carboxylic acid-containing monomers and their salts, including the steps of: (1) forming a reaction mixture, substantially free of carboxylic acid-containing monomers and their... | 05/20/2003 |
| 6541573 | Method for eliminating formamide from polymerizates containing n-vinyl formamide units A process for the elimination of formamide from polymers containing N-vinylformamide units involves treating formamide-containing polymers with from 1 to 2 mol-equivalents of an acid or a base, based on 1 mol-equivalent of formamide, under reaction condit... | 04/01/2003 |
| 6518366 | Nitrile group-containing fluoroelastomer and preparation process of same To provide a solid fluoroelastomer having nitrile group at the end which gives a crosslinked product being excellent in heat resistance, solvent resistance, chemical resistance, compression set and cleanliness, and an economical process for preparation th... | 02/11/2003 |
| 6472463 | Graft copolymer pigment dispersant A polymer dispersant for pigments based on an acrylic graft copolymer wherein the graft copolymer has a weight average molecular weight of at least 3000 and has 10 to 90% by weight of a polymeric backbone and 90 to 10% by weight of macromonomer side chain... | 10/29/2002 |
| 6465576 | Fluoroelastomer compositions and articles made therefrom A fluoroelastomer composition having improved compression set. The fluoroelastomer composition comprises: (1) a fluoroelastomer containing interpolymerized units of at least one perfluoroolefin, at least one perfluorovinyl ether, and a cure site component... | 10/15/2002 |
| 6423786 | Alkylhydrazine functionalized resin Disclosed are polymers comprising alkylhydrazine-functionalized styrene units of Formula 1 ##STR1## wherein ##STR2## m is an integer from 1 to 3; n is an integer from 0 to 50; p is an integer from 1 to 25; and R1 is C1 -C3... | 07/23/2002 |
| 6335398 | Super absorbent polymer composition A super absorbent polymer composition comprising a chelating compound (A) which has a site capable of forming a chelate with a copper ion and whose copper salt has a solubility in physiological saline at 25° C. of 0.01% by weight or less and a super abso... | 01/01/2002 |
| 6303703 | Method for making monoamines The present invention provides a new and improved method of producing halogen-free oligomeric olefin monoamines which avoids the use of costly high-pressure and high-temperature equipment. In one embodiment the method comprises epoxidizing a specific clas... | 10/16/2001 |
| 6294615 | Copolymer, cationic high molecular weight flocculating agent comprising the copolymer, and process for producing the copolymer A copolymer which can provide an aqueous solution thereof having high viscosity, a cationic high molecular weight flocculating agent comprising the copolymer and a process for producing the copolymer. The copolymer is formed by a process where copolymer u... | 09/25/2001 |
| 6281296 | Curable perfluoroelastomer composition Perfluoroelastomer compositions comprising perfluoroelastomers having copolymerized units of tetrafluoroethylene, a perfluoro(vinyl ether), and a nitrile-containing cure site monomer are cured with compounds that are capable of generating ammonia at tempe... | 08/28/2001 |
| 6252006 | Fluororubber coating composition A coating composition of a fluororubber containing a fluorine-containing elastomeric copolymer which has repeating units of the formula: --CH2 -- in the backbone, a polyol curing agent, and a salt or a complex compound of a basic compound havin... | 06/26/2001 |
| 6228949 | Polymers of 3-butene esters, their preparation and use The specification describes various polymers having monomer of formula (I): ##STR1## In formula (I), R1 and R2 are, independently, hydrogen, a C1 -C24 alkyl group, an aromatic or heteroaromatic group, a C3 -C8 c... | 05/08/2001 |
| 6221971 | Process for curing elastomeric vinylidene fluoride copolymers Elastomeric vinylidene fluoride-containing copolymers are cured by a sequential process. In a first step, gum fluoroelastomer is mixed at a temperature of 150° C.-250° C. in the presence of an organic base and metal oxide or metal hydroxide to generate ... | 04/24/2001 |
| 6221970 | Curable perfluoroelastomer composition Curable perfluoroelastomer compositions are disclosed that comprise ammonia and uncured perfluorinated elastomers having copolymerized units of nitrile-containing cure site monomers. Such compositions are curable at low temperatures. In addition, curable ... | 04/24/2001 |
| 6160057 | Polymers of 3-butene esters, their preparation and use The specification describes various polymers having monomer of formula (I): ##STR1## In formula (I), R1 and R2 are, independently, hydrogen, a C1 -C24 alkyl group, an aromatic or heteroaromatic group, a C3 -C8 | 12/12/2000 |
| 6077911 | Imidation of polymers based on esters of methacrylic acid and acrylic acid Polymers essentially comprising units of the formula I ##STR1## in which R1 and R2 are hydrogen or methyl and R3 is hydrogen, C1 -C18 -alkyl, C5 -C12 -cycloalkyl, C6 -... | 06/20/2000 |