Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7157550 | Purification process of thermoprocessable tetrafluoroethylene copolymers A purification process of thermoprocessable tetrafluoroethylene (TFE) copolymers comprising the following steps: A) the polymer latex is transformed into gel form, under mechanical stirring, by addition of an acid electrolyte having pH values≦2; ... | 01/02/2007 |
| 7157124 | Polymerizable compounds and their polymers A compound represented by formula (1) or (2) and a polymer obtained by polymerizing the compound are provided: wherein Ra is one of the groups represented by Formulas (3-1) to (3-5); Rb is h... | 01/02/2007 |
| 7015368 | Purification process of thermoprocessable tetrafluoroethylene copolymers A purification process of thermoprocessable tetrafluoroethylene (TFE) copolymers comprising the following steps: A) the polymer latex is transformed into gel form, under mechanical stirring, by addition of an acid electrolyte havin... | 03/21/2006 |
| 6861565 | Process for producing a fluoroalkanol A process for producing a fluoroalkanol which can easily be industrially practiced with high selectivity, is provided. CHR1R2OH, a radical initiator and CF2═CFRf are continuously supplied and reacted at from 105 t... | 03/01/2005 |
| 6805920 | Polymerizable liquid crystal compound and optical film This invention provides a polymerizable liquid crystal compound having a large value of Δn/n, excellent in coating properties on an alignment film and easily aligned. Disclosed is a polymerizable liquid crystal compound having at least one polymerizable reactive gr... | 10/19/2004 |
| 6710215 | Method of a simultaneous preparation of hexafluoropropylene and octafluorocyclobutane A method of simultaneous and selective prepararation of hexafluoropropylene and octafluorocyclebutane comprising the steps of: (a) thermally decomposing difluorochloromethane to obtain tetrafluoroethylene and then supplying the resulting tetrafluoroethylene i... | 03/23/2004 |
| 6670511 | Fluorine-containing diene, its production method and its polymer A fluorine-containing diene represented by the formula 1: wherein each of X and Y which are independent of each other, is an atom selected from a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, provided that X and Y are not ... | 12/30/2003 |
| 6653515 | Synthesis of , ଲ, ଲ-trifluorostyrene via in-situ formation of trifluorovinyl metal halide ,ଲ,ଲ-Trifluorostyrene and derivatives thereof synthesized in two steps from 1,1,1,2-tetrafluoroethylene. In the first step, 1,1,1,2-tetrafluoroethylene is reacted with a base, a metal salt such as zinc chloride and an optionally amine t... | 11/25/2003 |
| 6448452 | Fluorine-containing diene, its production method and its polymer A polymer which contains monomer units formed by polymerization of a fluorine-containing diene of formula 1: CF2.dbd.CF(CF2)n CXYOCF.dbd.CF2 Wherein X and Y are hydrogen and chlorine, hydrogen and-bromine, hydrogen a... | 09/10/2002 |
| 6396680 | Monolithic capacitor and process for producing the capacitor A monolithic capacitor including a sintered body formed from a TiO2 -containing reduction-resistant dielectric ceramic material; a plurality of internal electrodes which are formed inside the sintered body, the electrodes being formed of a base... | 05/28/2002 |
| 6365676 | Poly-perfluoroalkyl substituted polyamines as grease proofing agents for paper and foam stabilizers in aqueous fire-fighting foams The invention concerns a process for the reaction of a perfluoroalkyl iodide of the formula CF3 (CF2)h --I, where h is an integer from 4 to 18, with a compound having a terminal olefinic group, which comprises conducting s... | 04/02/2002 |
| 6350925 | Perhaloethyl aromatic compounds and perhaloethenyl aromatic compounds therefrom A synthesis is provided for ,ଲ-difluoro-ଲ-halo-ethenyl aromatic compounds such as ,ଲ,ଲ-trifluorostyrenes by a process of reacting CFX2 CFXI, wherein each X is independently F or Cl, provided that at least o... | 02/26/2002 |
| 6166156 | Method for making photocurable halofluorinated acrylates Halofluorinated alkylene monomers are made by a method comprising the steps of: (a) subjecting a first polymer which is the reaction product of a fluorinated vinyl monomer and a vinyl comonomer to dehydrohalogenation to form a second polymer; (b) treating... | 12/26/2000 |
| 5652147 | Method of measuring concentration of polymerization inhibitor contained in fluorine-containing olefinic monomer and method of polymerizing fluorine-containing olefinic monomer comprising the measurement method There is provided a precisely quantitative measurement method of a hydrocarbonaceous polymerization inhibitor component in a fluorine-containing olefinic monomer, which inhibitor component is contained in the monomer in such a trace amount that it cannot ... | 07/29/1997 |
| 5268516 | Synthesis of perfluoroalkyl iodides The invention relates to a continuous process for the preparation of perfluoroalkyl iodides containing from 4 to 12 carbon atoms by thermal telomerization of tetrafluoroethylene by pentafluoroethyl iodide or heptafluoroisopropyl iodide in a tubular reacto... | 12/07/1993 |
| 5254774 | Preparation of hexafluoropropene oligomers A process for the oligomerization of hexafluoropropene comprises contacting hexafluoropropene with a catalyst or a mixture of catalysts selected from the group consisting of the cyanide, cyanate, and thiocyanate salts of alkali metals, quaternary ammonium... | 10/19/1993 |
| 5162594 | Process for production of polyfluoroolefins This invention concerns a process for the production of polyfluoroolefins by the catalytic addition of polyfluoroallylic fluorides to fluoroethylenes. 1:1 and 1:2 Adducts such as F-pentene-2 and F-heptene-3 can be formed selectively and reduced further to... | 11/10/1992 |
| 5145592 | Neutral hydrogen-free fluorocarbon cotelomers A class of neutral, hydrogen-free liquid or waxy perfluorinated cotelomers is described. The cotelomers contain more than 50% weight of fluorine and are derived from chlorotrifluoroethylene and a member selected from the group consisting of one perfluorin... | 09/08/1992 |
| 5001163 | Organic polymeric material and ion-exchange membrane with pendant carbocyclic exchanging groups produced An organic polymeric material, which is preferably perfluorinated and which comprises a polymeric chain and at least one group pendant from the chain, in which the group pendant from the chain comprises a saturated cyclic group and at least one ion-exchan... | 03/19/1991 |
| 4668710 | Trihalovinyl polyol ethers Included are trihalovinyl polyol ethers. The compositions have pendant 1,2,2-trihaloethenyl moieties. The compositions may be low viscosity oils or highly polymeric such as incorporated with a urethane or other polymers. One of the uses of the composition... | 05/26/1987 |
| 4296265 | Process for preparing hexafluoropropene oligomers Hexafluoropropene oligomers are prepared from hexafluoropropene in a high conversion by contacting gaseous hexafluoropropene with a catalyst comprising an alkali metal fluoride supported on activated charcoal or nickel oxide.... | 10/20/1981 |
| 4057591 | Process for preparing oligomers of tetrafluoroethylene Oligomers of tetrafluoroethylene are prepared by oligomerization of tetrafluoroethylene in an organic solvent in the presence of a fluoride compound and a crown ether. The catalytic action of the fluoride compound can be far improved when the fluoride com... | 11/08/1977 |
| 4042638 | Process for preparing oligomers of hexafluoropropene Oligomers of hexafluoropropene are prepared by oligomerization of hexafluoropropene in an organic solvent in the presence of a halide compound and a crown ether. The selectivity to the dimer or trimer may vary depending on the kind of solvent. For example... | 08/16/1977 |
| 4039595 | Copolymers of ethylene and hexafluoropropene Copolymers of ethylene and hexafluoropropene (HFP) containing between about 15 mol percent and 50 mol percent HFP comprising low to intermediate molecular weight oils of high viscosity. The copolymers are prepared in the presence of a free radical initiat... | 08/02/1977 |
| 4016217 | Preparation of perfluoroolefines A process for making branched, internally-unsaturated liquid perfluoroolefins that are oligomers of tetrafluoroethylene and have an empirical formula (C2 F4)n where n is an integer of 4 to 7, comprising contacting tetraflu... | 04/05/1977 |
