Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7977451 | Polyarylether membranes Membranes for use in methods and apparatuses for hemodialysis and hemofiltration are composed of at least one membrane comprising a polyarylethernitrile having structural units of formula 1, 2, 3 and 4 wherein ... | 07/12/2011 |
| 7642336 | Phthalonitrile composites The disclosed compositions and methods for producing composite materials that are suitably adapted for use in elevated temperature environments generally include the use of oxyarylbisorthodinitrile matrix resins in conjunction with aromatic amines to produce an impr... | 01/05/2010 |
| 7427394 | Biodegradable poly(β-amino esters) and uses thereof Poly(β-amino esters) prepared from the conjugate addition of bis(secondary amines) or primary amines to a bis(acrylate ester) are described. Methods of preparing these polymers from commercially available starting materials are also provided. These tertiary amine-c... | 09/23/2008 |
| 7271227 | Adhesive compositions free of metallic catalyst The present invention generally relates to curable compositions free of metallic catalysts. The inventive compositions are capable of curing when applied to a metal substrate. The inventive compositions provide improved thermal performance and enhanced cure strength... | 09/18/2007 |
| 7244631 | MEMS surface modification for passive control of charge accumulation In one embodiment, a method of treating a surface of a Micro-Electromechanical System (MEMS) device reduces or eliminates performance degradation due to charge migration and accumulation. Briefly, the method may include treating a dielectric surface of the MEMS devi... | 07/17/2007 |
| 7244803 | Poly-o-hydroxyamide, polybenzoxazole from the poly-o-hydroxyamide, electronic component including a polybenzoxazole, and processes for producing the same A dielectric for aluminum and copper metalizations is stable at high temperatures. Surprisingly, in spite of the elimination of water during the cyclization, the polymeric dielectrics are very suitable for filling narrow trenches. The filled trenches exhibit no defe... | 07/17/2007 |
| 7161151 | Plastic identifying method A plastic identifying method of the present invention is provided with a step (i) of obtaining a first infrared absorption spectrum by irradiating infrared light of a predetermined wave number onto an item to be identified that contains plastic and measuring the int... | 01/09/2007 |
| 7067586 | Methods of making ABA-type block copolymers having a random block of hydrophobic and hydrophilic monomers Block copolymers are prepared by living-type or semi-living type free radical polymerization, with said copolymers having at least one random block comprised of at least one hydrophobic monomer and at least one hydrophilic monomer. The selection of hydrophobic and h... | 06/27/2006 |
| 7022808 | Polymers A polymer having a plurality of 5–6 membered unsaturated rings which may be the same or different, linked together by way of linker chains to form a backbone, at least some of said 5–6 membered unsaturated rings carrying a ligand. Polymers of this nature can act... | 04/04/2006 |
| 7022178 | Binding agent, core sand mixture and a method for producing the same A binding agent system based on water glass is disclosed, comprising an aqueous alkali silicate solution having the general composition: xSiO2·yM2O ·zH2O, with M standing for the alkali ions Li+, K+, or Na | 04/04/2006 |
| 6998115 | Biodegradable poly(β-amino esters) and uses thereof Poly(β-amino esters) prepared from the conjugate addition of bis(secondary amines) or primary amines to a bis(acrylate ester) are described. Methods of preparing these polymers from commercially available starting materials are also provided. These tertiary amine-c... | 02/14/2006 |
| 6974856 | Block copolymers having polymer segment derived from oxazoline Disclosed are block copolymers represented by the following general formula (I) wherein AI represents a hydroxyl group or an organic residue derived from an anionic polymerization initiator, R represents a hydrogen atom... | 12/13/2005 |
| 6933411 | Aromatic diamine and polyimide thereof The aromatic diamine compound of the present invention is represented by the following formula (1), and from the aromatic diamine compound a polyimide having a repeating unit represented by the following formula (4), which has low-temperature adherability, can be ob... | 08/23/2005 |
| 6350305 | Selected polymeric furanone magenta colorants A polymeric furanone magenta colorant is disclosed that contains a furanone magenta chromophore having a furanone adduct, the adduct containing at least one alkoxylated phenyl radical, the chromophore further being derived from at least one aromatic aldeh... | 02/26/2002 |
| 6228977 | Nonlinear optically active copolymers The nonlinear optically active copolymers according to the invention are polyadducts of at least one organic di- or polycyanate and a nonlinear optically active compound, i.e. a chromophore. These copolymers have outstanding thermal stability and are suit... | 05/08/2001 |
| 6204354 | Soft compounds derived from polypropylene grafted disubstituted ethylene- maleimide copolymers The instant invention teaches a method for enabling the formation of a high damping, soft polymer gel. The method includes: reacting a poly(disubstituted ethylene-co-maleimide) polymer with a maleated polyalkylene and an alkyl diamine under substantially ... | 03/20/2001 |
| 6201096 | Continuous polymerization process for preparing polyamides from omega-aminonitriles A continuous process for the polymerization of omega-aminonitriles (e.g., 6-aminocapronitriles) which is introduced at the top of a vertical multistage reactor being swept countercurrently with steam and polyamide (e.g., nylon 6) is recovered near the bot... | 03/13/2001 |
| 6001926 | Fiber-reinforced phthalonitrile composite cured with low-reactivity aromatic amine curing agent A fiber-reinforced phthalonitrile composite is made by impregnating or coating a fibrous material with a phthalonitrile prepolymer mixture containing a phthalonitrile monomer and an aromatic amine curing agent that is thermally stable and nonvolatile at a... | 12/14/1999 |
| 5973033 | Compounds with substituted cyclic hydrocarbon moieties linked by secondary or tertiary oxycarbonyl containing moiety providing reworkable cured thermosets Compounds containing two cyclic hydrocarbon moieties which are substituted to provide crosslinking functionality and which are linked to each other by secondary or tertiary oxycarbonyl containing moiety are basis for compositions which are cured to provid... | 10/26/1999 |
| 5942598 | Perfluoroalkyleneethertriazine oligomer and process for producing the same Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC-Rf0 --CN, where Rf0 is --(CFXOCF2)a (CF2)b (CF2 OCFX)c --, where X is a fluorine atom o... | 08/24/1999 |
| 5939508 | High temperature epoxy-phthalonitrile blends A copolymer is formed from reacting, within a melt, a phthalonitrile resin with an epoxy resin having at least three epoxy groups. In an alternative embodiment, a copolymer is formed by reacting a phthalonitrile resin with an epoxy resin, at least one of ... | 08/17/1999 |
| 5844066 | Process for the preparation of lactic acid-based polyester The present invention provides a process for the preparation of a lactic acid-based polyester having an excellent moldability, storage stability and biodegradability which has a less residual lactide left therein and is less susceptible to decomposition o... | 12/01/1998 |
| 5834575 | Compounds and polymers, resin compositions, nonlinear optical element and nonlinear optical devices, and production process therefor As a heteroaromatic compound made functional so as to be used in nonlinear optical materials, the present invention provides a heteroaromatic compound represented by the following Formula (1), (2), (3) or (4), a polymer obtained from any of these, a nonli... | 11/10/1998 |
| 5789532 | Perfluoroalkyleneethertriazine oligomer and process for producing the same Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC--RF0 --CN where Rf.sup. is --(CFXOCF2)a(CF2)b(CF2 OCFX)c--, where X is a fluorine atom or a CF3 group, a is an inte... | 08/04/1998 |
| 5783659 | Perfluoroalkyleneethertriazine oligomer and process for producing the same Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC--Rf0 --CN, where Ff0 is --(CFXOCF2)a(CF2)b(CF2 OCFX)c--, where X is a fluorine atom or a CF3 group, a is... | 07/21/1998 |
| 5708129 | Die attach adhesive with reduced resin bleed Described is a method of reducing resin bleed of a cyanate ester-containing die attach adhesive produced by curing a liquid resin system that contains cyanate ester monomer or mixtures that include cyanate ester monomer by adding an additive comprising at... | 01/13/1998 |
| 5681921 | Perfluoroalkyleneethertriazine oligomer and process for producing the same Perfluoroalkyleneethertriazine oligomer obtained by reacting a dinitrile compound NC--Ff0 --CN, where Ff0 is --(CFXOCF2)a(CF2)b(CF2 OCFX)c--, where X is a fluorine atom or a CF3 group, a is... | 10/28/1997 |
| 5641852 | Thermosetting resin composition and method of manufacturing it from an epoxy resin, cyanate and phenol Disclosed is a thermosetting resin composition comprising cyanate resin, a compound containing at least one or more than one of a phenolic hydroxyl radical and an epoxy resin, wherein said resin has excellent adhesive and heat resistant properties while a... | 06/24/1997 |
| 5621145 | Bisamidoxime compound, process for preparing the same and a fluorine-containing elastomer composition comprising the same When a novel bisamidoxime compound represented by the following general formula: ##STR1## where R is an alkylidene group having 1 to 6 carbon atoms, or a perfluoroalkylidene group having 1 to 10 carbon atoms, is used as a vulcanizing agent for f... | 04/15/1997 |
| 5489637 | Low temperature flexible die attach adhesive and articles using same Described is a flexible adhesive formulation for bonding a semiconductor device to a flexible substrate and a flexible card containing a semiconductor device which can be processed in a computer.... | 02/06/1996 |
| 5405916 | Process for the preparation of polyolefin/acrylonitrile copolymers and polyolefin/acrylic acid or substituted acrylic acid/acrylonitrile terpolymers Terpolymers of polyolefin/acrylic acid or substituted acrylic acid/acrylonitrile are prepared by combining a polyolefin/acrylic acid or substituted acrylic acid copolymer with at least one dinitrile to form a mixture and reacting the mixture at a temperat... | 04/11/1995 |
| 5386000 | Low temperature flexible die attach adhesive and articles using same Described is a flexible adhesive formulation for bonding a semiconductor device to a flexible substrate and a flexible card containing a semiconductor device which can be processed in a computer.... | 01/31/1995 |
| 5371178 | Rapidly curing adhesive and method Described is a rapidly curing adhesive formulation and a method of reducing the curing time of an adhesive formulation containing cyanate ester.... | 12/06/1994 |
| 5350828 | Synthesis and polymerization of dithioether-linked phthalonitrile monomers Dithioether-linked phthalonitrile monomer are prepared by a substitution reaction between 4-nitrophthalonitrile and a dimercaptan and are polymerized to a high-temperature, oxidation-resistant polymer by heating them at a temperature above their melting p... | 09/27/1994 |
| 5304625 | Phosphazene-containing amine as curing agent for phthalonitrile-based polymer Phosphazene-containing amines having at least one amine or substituted amine moiety reactive with nitrile groups of the phthalonitrile monomers or oligomeric resins are useful curing agents for phthalonitriles. Typically, the phosphazene-containing amines... | 04/19/1994 |
| 5292854 | Synthesis of phthalonitrile resins containing ether and imide linkages with aromatic diamine curing agent Imide-containing phthalonitrile monomers are prepared from a phthalonitrile and an aromatic dianhydride. The monomer and a method for preparing the monomer is disclosed. These monomers are synthesized into heat resistant polymers and copolymers with aroma... | 03/08/1994 |
| 5284924 | Process for the preparation of polyolefin/acrylonitrile coploymers and polyolefin/acrylic acid or substituted acrylic acid/acrylonitrile terpolymers Terpolymers of polyolefin/acrylic acid or substituted acrylic acid/acrylonitrile are prepared by combining a polyolefin/acrylic acid or substituted acrylic acid copolymer with at least one dinitrile to form a mixture and reacting the mixture at a temperat... | 02/08/1994 |
| 5262514 | Polymer from diimido-di-phthalonitrile Substituted and unsubstituted di-phthalonitrile monomers devoid of ether /or phenoxy groups are solid at room temperature and which monomers are defined by the following general formula: ##STR1## where R is an aromatic tetravalent radical, thermopla... | 11/16/1993 |
| 5250600 | Low temperature flexible die attach adhesive and articles using same Described is a flexible adhesive formulation for bonding a semiconductor device to a flexible substrate and a flexible card containing a semiconductor device which can be processed in a computer.... | 10/05/1993 |
| 5247060 | Curing phthalonitriles with acid Curing of phthalonitrile monomers and prepolymers is accelerated by inclusion of an acid curing agent. Cured phthalonitrile polymers have high thermal oxidative stability and are useful as resins in various compositions and as adhesives.... | 09/21/1993 |
