Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6863211 | Omega-hydrofluoroalkyl ethers, precursor carboxylic acids and derivatives thereof, and their preparation and application Normally liquid, omega-hydrofluoroalkyl ether compounds (and selected mixtures thereof) have a saturated perfluoroaliphatic chain of carbon atoms interrupted by one or more ether oxygen atoms. The compounds can be prepared, e.g., by decarboxylation of the correspond... | 03/08/2005 |
| 4866118 | Fluorocarbon elastomer articles having improved amine resistance The amine resistance of peroxide-cured fluorocarbon elastomers is improved by dispersing certain normally solid, inorganic chloride or bromide salts in the elastomer gum formulation.... | 09/12/1989 |
| 4863983 | Extrudable thermoplastic hydrocarbon polymer composition An extrudable composition comprising hydrocarbon polymer, organophosphite or organophosphate compound and fluorocarbon polymer. The organophosphite or organophosphate and the fluorocarbon polymer are present in the composition in such relative proportions... | 09/05/1989 |
| 4855360 | Extrudable thermoplastic hydrocarbon polymer composition An extrudable composition comprising thermoplastic hydrocarbon polymer, poly(oxyalkylene) polymer and fluorocarbon polymer. The poly(oxyalkylene) polymer and the fluorocarbon polymer are present in the composition in such relative proportions and concentr... | 08/08/1989 |
| 4803239 | Fluorocarbon elastomer articles having improved amine resistance The amine resistance of peroxide-cured fluorocarbon elastomers is improved by dispersing certain normally solid, inorganic chloride or bromide salts in the elastomer gum formulation.... | 02/07/1989 |
| 4795590 | Treatment of hazardous material with vapor suppressing, persistent, water-containing, polymeric air foam Air is mechanically entrained in an aqueous solution of surfactant and poly(oxyalkylene) polyisocyanate polymer, the poly(oxyalkylene) portion of which contains sufficient oxyethylene units to render the polymer water-soluble and hydrophilic, to form a fl... | 01/03/1989 |
| 4795764 | Poly(oxyalkylene) poly(aliphatic isocyanate) prepolymer and polyurea polymer derived therefrom by reaction with polyamine Air is mechanically entrained in an aqueous solution of surfactant, polyamine reactant, and low moisture sensitive poly(oxyalkylene) poly(aliphatic isocyanate) prepolymer the poly(oxyalkylene) portion of which contains sufficient oxyethylene units to rend... | 01/03/1989 |
| 4668558 | Shaped plastic articles having replicated microstructure surfaces An article comprising a shaped, plastic layer or body comprising crosslinked polymer with hard and soft segments or moieties and having a microstructure-bearing surface is prepared by a process comprising filling a mold master, bearing or encoded with the... | 05/26/1987 |
| 4647413 | Perfluoropolyether oligomers and polymers Perfluoropolyether oligomers or block polymers, having a backbone with one or a plurality of perfluoropolyether segments each consisting essentially of (1) at least one perfluoroisopropyleneoxy unit, (2) a bis(perfluoromethyleneoxy-terminated) unit, and (... | 03/03/1987 |
| 4614667 | Composite low surface energy liner of perfluoropolyether Composite low surface energy liner provided by an inner layer of insoluble polymer made from a polymerizable, film-forming monomer and an outer layer of insoluble polymer made from a polymerizable perfluoropolyether monomer copolymerizable with said film-... | 09/30/1986 |
| 4595720 | Processing elastomers The processing of elastomer gums, which can be natural rubber or synthetic elastomers such as copolymers of vinylidene fluoride and hexafluoropropylene, are improved by incorporating in said gum, along with conventional chemical and compounding ingredient... | 06/17/1986 |
| 4582885 | Shaped plastic articles having replicated microstructure surfaces An article comprising a shaped, plastic layer or body comprising crosslinked polymer with hard and soft segments or moieties and having a microstructure-bearing surface is prepared by a process comprising filling a mold master, bearing or encoded with the... | 04/15/1986 |
| 4576850 | Shaped plastic articles having replicated microstructure surfaces An article comprising a shaped, plastic layer or body comprising crosslinked polymer with hard and soft segments or moieties and having a microstructure-bearing surface is prepared by a process comprising filling a mold master, bearing or encoded with the... | 03/18/1986 |
| 4567073 | Composite low surface energy liner of perfluoropolyether Composite low surface energy liner provided by an inner layer of insoluble polymer made from a polymerizable, film-forming monomer and an outer layer of insoluble polymer made from a polymerizable perfluoropolyether monomer copolymerizable with said film-... | 01/28/1986 |
| 4564662 | Fluorocarbon elastomer Peroxide-curable fluorocarbon elastomers having interpolymerized units derived from a cure site monomer containing bromine or iodine. The fluorocarbon elastomer gums are prepared by copolymerizing with the principal monomers normally used in preparing flu... | 01/14/1986 |
| 4472480 | Low surface energy liner of perfluoropolyether Low surface energy liner provided by segments of a perfluoropolyether monomer which has been in-situ polymerized into a cohesive network which is adhered to a substrate. The low surface energy liner is especially useful as a low-adhesion backsize coating ... | 09/18/1984 |
| 4468527 | Fluorinated alcohols A fluoroaliphatic radical- and aliphatic chlorine-containing alcohol containing more than 25 weight percent carbon-bonded fluorine in the form of fluoroaliphatic radicals and at least one aliphatic chlorine, an ester of said alcohol and a carboxycylic aci... | 08/28/1984 |
| 4450263 | Fluoropolymer gum of vinylidene fluoride, hexafluoropropene, and bromodifluoroethylene A fluoropolymer gum of 60 to 85 mol percent vinylidene fluoride, 10 to 40 mol percent of hexafluoropropene and 0.15 to 3 mol percent 1-bromo-2,2-difluoroethylene is provided which can be blended with fluorosilicone gum and vulcanized in presence of free-r... | 05/22/1984 |
| 4446270 | Vulcanizing fluorocarbon elastomers with one or a mixture of aromatic compounds having hydroxyl and oxyallyl groups A composition comprising elastomeric copolymer gum of vinylidene fluoride and at least one terminally unsaturated monolefin comonomer and as a vulcanizing agent therefor a composition comprising one or a mixture of aromatic compounds having hydroxyl and o... | 05/01/1984 |
| 4404247 | Protective covering for magnetic recording medium Magnetic recording medium protected by an ultra-thin, composite low surface energy covering provided by an inner layer of insoluble polymer and an outer layer of insoluble polymer which are made by in situ polymerization. The inner layer is made from two ... | 09/13/1983 |
| 4356273 | Fluorochemical foam stabilizer and foamed polyurethanes made therewith Active hydrogen-containing fluorochemical is used as a foam stabilizer in preparing polyurethane foams. For example, rigid or flexible polyurethane foams with high or low density and uniform cellular structure are prepared using fluoroaliphatic radical-su... | 10/26/1982 |
| 4349456 | Non-vitreous ceramic metal oxide microcapsules and process for making same Shaped and fired, porous or impermeable nonvitreous ceramic microcapsules of metal oxide, preferably transparent and polycrystalline, are made by a non-melt process comprising the liquid-liquid extraction of aqueous metal oxide precursor with a dehydratin... | 09/14/1982 |
| 4340749 | Carpet treatment An ester of a fluoroaliphatic radical- and aliphatic chlorine-containing alcohol and a mono or polycarboxylic acid useful in carpet treatment.... | 07/20/1982 |
| 4306993 | Microcapsules containing perfluoroalkyl pentafluorosulfide Vapor permeable microcapsules filled with volatile perfluoroalkyl pentafluorosulfide and used to tag articles for the detection thereof.... | 12/22/1981 |
| 4293663 | Fluoroelastomer/polyepichlorohydrin elastomer articles A gum stock composition comprising fluoropolymer gum, polyepichlorohydrin gum, polyphenol, and organo-onium compound is mixed with acid acceptor to form a curable gum stock, and the latter is shaped and cured to form shaped elastomeric articles.... | 10/06/1981 |
| 4293441 | Corrosion inhibiting heat transfer liquid A liquid composition useful for minimizing corrosion of aluminum surfaces comprising ethylene glycol or propylene glycol and fluoroaliphaticsulfonamidophosphonic acid or the salt thereof.... | 10/06/1981 |
| 4289892 | Fluorochemical foam stabilizer and foamed polyurethanes made therewith Active hydrogen-containing fluorochemical is used as a foam stabilizer for polyurethane foams. For example, rigid or flexible polyurethane foams with high or low density and uniform cellular structure are prepared using fluoroaliphatic radical-substituted... | 09/15/1981 |
| 4287322 | Epichlorohydrin elastomer compositions A gum stock composition comprising polyepichlorohydrin gum, polyphenol, organo-onium compound, and acid acceptor is shaped and cured to form shaped elastomeric articles.... | 09/01/1981 |
| 4287320 | Composition of fluoroelastomer and diorganosulfuroxide A diorgano sulfur oxide is included in a curable vinylidene fluoride elastomer formulation to provide desirable curing characteristics.... | 09/01/1981 |
| 4264484 | Carpet treatment Carpet is rendered soil resistant and stain repellant by contacting it with a carpet treating composition comprising a liquid containing a water-insoluble addition polymer derived from polymerizable ethylenically unsaturated monomer free of nonvinylic flu... | 04/28/1981 |
| 4263414 | Vulcanizable blend of bromine-containing fluoropolymer and fluorosilicone gums A blend of (a) 90 to 20 parts fluoropolymer gum of 60 to 85 mol percent vinylidene fluoride, 10 to 40 mol percent of hexafluoropropene and 0.15 to 3 mol percent bromine-containing olefin, and (b) 10 to 80 parts fluorosilicone gum is provided which can be ... | 04/21/1981 |
| 4258644 | Depositing latent fingerprints and development thereof Latent fingerprints having a latency of several weeks are applied to paper substrates using compositions comprising trimeric aliphatic acids of at least 30 carbon atoms which are substantive to paper fibers are substantially non-volatile, and are non-hard... | 03/31/1981 |
| 4233421 | Fluoroelastomer composition containing sulfonium curing agents A thermally stable, curable fluoroelastomer composition containing sulfonium curing agent is described. The composition is curable in reactive admixture with an inorganic acid acceptor and includes: (a) a fluoroelastomer comprising vinylidene fluoride; (b) at ... | 11/11/1980 |
| 4215205 | Fluoroaliphatic radical and carbodiimide containing compositions for fabric treatment Durably launderable and dry-cleanable repellency to water and oil is conferred on fabrics consisting essentially completely of hydrophobic synthetic fibers by application of a blend of a fluoroaliphatic vinyl polymer and a carbodiimide, preferably compris... | 07/29/1980 |
| 4202706 | Corrosion resistance treatment of aluminum with N-alkyl-fluoroaliphaticsulfonamidophosphonic acids and salts thereof The surfaces of articles made of aluminum, such as annodized aluminum and bare aluminum, are treated with N-alkyl-fluoroaliphaticsulfonamidophosphonic acids or salts thereof to impart corrosion resistance to said surfaces.... | 05/13/1980 |
| 4166147 | Shaped and fired articles of TiO2 Solid, shaped and fired refractory articles, such as fibers and microspheres, of titanium dioxide are made by shaping, gelling, and firing titania sols. Said fibers can be made by extruding in air a viscous aqueous titania sol, and heating and firing the ... | 08/28/1979 |
| 4047965 | Non-frangible alumina-silica fibers Transparent, smooth, fracture resistant, discreet, refractory oxide fibers of homogeneous chemical composition comprising 96 to 100 weight percent of a mixture or chemical combination of 67 to 77 parts by weight alumina and 23 to 33 parts by weight silica... | 09/13/1977 |
| 4031036 | Use of bis(fluoroaliphaticsulfonyl) imides in cationic polymerization Bis(fluoroaliphaticsulfonyl)imides, in active or latent form, are used as catalysts for the polymerization of cationic sensitive monomers, e.g., epoxy resins.... | 06/21/1977 |
