...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.
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 |
| 7342057 | Self-healing coatings using microcapsules to suppress lead dust Self-healing coatings incorporate microcapsules of about 60-150 microns diameter that contain film formers and dust suppression compounds suitable for controlling spalling of lead dust, for example. In one embodiment, a primer paint is mixed with these microcapsules... | 03/11/2008 |
| 7326745 | Tread for a tire A tire tread comprising a rubber composition based on at least: (i) a diene elastomer; (ii) more than 60 phr of a reinforcing inorganic filler; (iii) between 2 and 15 phr of a coupling agent; and | 02/05/2008 |
| 7192993 | Self-healing coating and microcapsules to make same A liquid self-healing coating, incorporating microcapsules filled with tailored repair formulations, repairs itself upon physical compromise after curing. In one embodiment, a commercially available paint primer is mixed with a pre-specified amount of these microcap... | 03/20/2007 |
| 7109276 | Method for free radical reduction of dithiocarbonylated or dithiophosphorylated functions borne by a polymer The invention concerns a method for preparing a polymer, comprising a step which consists in contacting: (A) at least a living organic polymer having at its chain end a dithiocarbonylated or dithiophosphorylated function capable of being reactivated; (B) at least a ... | 09/19/2006 |
| 6951896 | Flame-retardant thermoplastic composition with improved properties The invention relates to a flame-retardant thermoplastic composition which comprises at least (A) a thermoplastic polymer and (B) a flame-retardant system and which also contains (C) an n-alkanelactam-substituted polymer. Such a composition shows both a good flame r... | 10/04/2005 |
| 6774163 | Flame retardants for polymers comprising a mixture of two different aryl phosphates, their preparation and their use The present invention relates to a novel flame retardant system for polymers comprising a mixture of two different aryl phosphates, to its preparation, and to its use. ... | 08/10/2004 |
| 6613824 | Flame retardant resinous compositions and method Disclosed are flame retardant resinous compositions comprising (i) at least one aromatic polycarbonate; (ii) at least one of a second polymer having structural units derived from one or more monomers selected from the group consisting of vinyl aromatic mo... | 09/02/2003 |
| 6569929 | Method to prepare phosphoramides, and resin compositions containing them The present invention relates to a method for preparing phosphoramides having a glass transition temperature in one embodiment of at least about 0° C., in another embodiment of at least about 10° C., and in still another embodiment of at least about 20Â... | 05/27/2003 |
| 6433046 | Flame retardant resin compositions containing phosphoramides, and method of making The present invention provides resin compositions comprising a thermoplastic resin, at least one phosphoramide having a glass transition point of at least about 0° C. preferably of at least about 10° C., and most preferably of at least about 20° C.; an... | 08/13/2002 |
| 6228912 | Flame retardant resin compositions containing phosphoramides and method for making The present invention provides resin compositions comprising a thermoplastic resin, at least one phosphoramide having a glass transition point of at least about 0° C., preferably of at least about 10° C., and most preferably of at least about 20° C.; a... | 05/08/2001 |
| 6174942 | Flame retardant polymer blends, and method for making Flame retardant blends comprising a polycarbonate portion containing spirobiindane units, at least one addition polymer such as a styrene-acrylonitrile or ABS copolymer, and at least one phosphoryl flame retardant have high temperature stability propertie... | 01/16/2001 |
| 6103797 | Flame-proofed moulding materials Thermoplastic molding compositions comprise A) from 30 to 97% by weight of a polyester, B) from 1 to 30% by weight of melamine cyanurate, C) from 1 to 30% by weight of at least one phosphorus-containing flame retardant which contains phosphorus in the valence state... | 08/15/2000 |
| 6075072 | Latent coating for metal surface repair A corrosion protective coating composition, applied over a metal surface, contains frangible microcapsules which rupture and release fluid upon impact or other stress likely to damage the coating. The fluid, from the microcapsules, contains a film forming... | 06/13/2000 |
| 5939493 | Pneumatic tire A rubber composition comprising 100 parts by weight of a rubber component which comprises at least one type of rubber selected from the group consisting of natural rubber and diene synthetic rubbers, 0.1 to 10 parts by weight of at least one type of metal... | 08/17/1999 |
| 5936048 | Method for preparing modified resins and their applications There are herein disclosed a method for preparing a modified resin which comprises thermal/reaction by the use of a norbornenyl group-containing compound typified by norbornenecarboguanamine or its derivative, a method for preparing an epoxy-modified resi... | 08/10/1999 |
| 5811470 | Flame retardant styrenic polymers Compositions and methods are described wherein a styrenic polymer is rendered flame retardant by incorporation therein before, during or after its formation, a combination of (a) at least one organic phosphorus additive that (i) is halogen-free, and (ii) ... | 09/22/1998 |
| 5723531 | Rubber composition and tire having tread thereof A rubber composition comprised of elastomer(s), carbon black reinforcement and coupling agents. In one aspect, a modified carbon black may be used. A tire having a component of such rubber composition such as, for example, a tread, is also provided.... | 03/03/1998 |
| 5670563 | Stabilised chlorine-containing polymer compositions The invention relates to compositions comprising a) a chlorine-containing polymer b) at least one organotin compound and c) at least one phosphorus compound of formula (R7 S)3 P.dbd.Xn wherein the meaning of the individual substituents i... | 09/23/1997 |
| 5646208 | Transesterification-inhibited polyester melt blend compositions having modified thermal properties This invention relates to new and useful melt blend compositions of polyethylene terephthalate and polyethylene isophthalate, and melt blend compositions of polyethylene terephthalate with random copolymers of polyethylene terephthalate and polyethylene i... | 07/08/1997 |
| 5516827 | Stabilized, chlorine-containing polymer compositions Compositions comprising a chlorine-containing polymer and a stabilizer mixture comprising: a) at least one tin alcoholate or tin carboxylate of the formula [(R2)2 Sn(OR')]2 O (Ia); [(R2)Sn(OR')2 ]2 O... | 05/14/1996 |
| 5389708 | Sulfur-containing acid phosphoric ester internal release agent An internal release agent comprises a sulfur-containing acid phosphoric esters selected from the group consisting of thiophosphoric acid esters and dithiophosphoric acid esters of the formula, ##STR1## where X and Y are independently selected from th... | 02/14/1995 |
| 5064886 | Dithiophosphonates, their preparation and use as anti-oxidants Certain novel dithiophosphonate derivatives, particularly monoesters, may be prepared inexpensively from hindered phenol compounds and are useful as anti-oxidants for example in lubricants and/or polymer materials.... | 11/12/1991 |
| 4680328 | Insect resistant polyethylene composition suitable for wire and cable applications An insect-resistant composition containing at least about 75 percent by weight of a polyethylene, e.g. LDPE, HDPE, or LLDPE, at least about 5 percent by weight, up to an amount approaching about 25 percent by weight of a compatability additive selected fr... | 07/14/1987 |
| 4645787 | Flame retardant polyphenylene oxide thermoplastics Thermoplastic flame retardant compositions of polyphenylene oxide and styrene are provided exhibiting superior resistance to stress cracking.... | 02/24/1987 |
| 4639482 | Phosphoric acid compounds as co-stabilizers for Me(II)-carboxylates and/or Me(II)-phenolates in PVC Compositions for the stabilization of polyvinylchloride comprising blends or tri- and tetrathiophosphoric acid esters and at least one polyvinylchloride stabilizer of the type Me(II)-carboxylate and/or Me(II)-phenolate as well as the polyvinylchloride sta... | 01/27/1987 |
| 4593058 | Flame retardant polyphenylene oxide thermoplastics Flame retardant blends of polyphenylene oxide and styrene resin are provided as a result of the use of a minor amount of a triorganothiophosphate.... | 06/03/1986 |
| 4584332 | Flame retardant polyphenylene oxide thermoplastics Flame retardant blends of styrene and polyphenylene oxide are provided resulting from the use of a mixture of zinc oxide and a triorganothiophosphate.... | 04/22/1986 |
| 4569962 | Perfluoropolyether compositions which are soluble in non-fluorinated solvents Polymeric compositions are provided in which perfluoropolyethers have been solubilized in non-fluorinated solvents by combining them with a solubilizing agent such as azotic conjugated compounds, and phosphorylated compounds. Typical of the perfluoropolye... | 02/11/1986 |
| 4537830 | Thermoplastic molding compositions of polyvinylbutyral containing plasticizer Thermoplastic molding compositions comprising 65-80% by weight (based on the molding composition) of a polyvinylbutyral which preferably contains 19-28% by weight (based on the polyvinylbutyral) of vinyl alcohol units, and 35-20% by weight (based on the m... | 08/27/1985 |
| 4536530 | Water tree resistant compounds and polymer compositions containing the same Organophosphorus compounds having the general formula ##STR1## useful as water tree resistant additives for polymeric compositions.... | 08/20/1985 |
| 4521581 | Polymer polyol prepared by crosslinking a low molecular weight polymer in a polyol A method of making polymer polyols is disclosed wherein a relatively low molecular weight liquid polymer of an ethylenically unsaturated monomer is mixed with a polyol and crosslinked in the polyol. The relatively low molecular weight polymer which is mix... | 06/04/1985 |
| 4367306 | Polyolefin composition A polyolefin composition is described, comprising: (A) a polyolefin which is modified with an unsaturated carboxylic acid or its derivative, or a mixture of such a modified polyolefin and a polyolefin, (B) aluminum or aluminum alloy in a powdery, fibrous ... | 01/04/1983 |
| 4364991 | Fire resistant compositions and composites Highly fire resistant composites or laminates particularly applicable as structural components in aircraft, e.g. in the engine nacelle, as part of the acoustic panel-fire wall structure, and capable of withstanding a 2,000° F. flame temperature, comprisi... | 12/21/1982 |
| 4322303 | Dithiophosphate stabilizers Compounds of the formula ##STR1## wherein the symbols R1, R2, R3, m, X, n, Y, q, r and Z have the meanings given in Claim 1. The divalent radical Y can optionally contain a group of the formula ##STR2## wher... | 03/30/1982 |
| 4308197 | Fire resistant composites Highly fire resistant composites or laminates particularly applicable as structural components in aircraft, e.g. in the engine nacelle, as part of the acoustic panel-fire wall structure, and capable of withstanding a 2,000° F. flame temperature, comprisi... | 12/29/1981 |
| 4302382 | Color stable aromatic polyesters Color stable compositions consisting of aromatic polyester and 0.01 to 0.5% by weight of the aromatic polyester of a stabilizer selected from the group consisting of phosphates, phosphonates and mixtures of either phosphates or phosphonates with epoxides ... | 11/24/1981 |
| 4222930 | Sulfur and phosphorus containing organosilicon compounds and process for their production and use There are prepared compounds of the formula where Z is .tbd.PO, .tbd.PS, .tbd.P, .dbd.PR, --P(R)2, --P(OR)2, .dbd.P(OR), --PO(OR)2, --PS(OR)2, .dbd.PO(OR) or .dbd.PS(OR) where R is an alkyl group of 1 to 5 carbon ato... | 09/16/1980 |
| 4198310 | High voltage insulating compositions containing organic polymerizable phosphorus compounds New high voltage insulating compositions are disclosed. The compositions comprise a polymer (e.g. a polysiloxane, epoxide resin or a polymer of one or more olefins or substituted olefins), an antitracking additive (e.g. an alumina hydrate), and certain or... | 04/15/1980 |
| 4177187 | Stabilizers for halogenated resins A mixture of a tin tetrakis (mercaptide) and an overbased organic complex of an alkali or alkaline earth metal base has been found to provide unexpected improvement in the heat stabilization of halogenated resins.... | 12/04/1979 |
| 4121025 | Polymer compositions The invention provides means for controlling the degradation of vinyl polymers by incorporating therein at least one non-ionic organo-soluble complex of a metal having an atomic number from 22 to 29, 40 to 47 or 57 to 79, the complex being activatable by ... | 10/17/1978 |