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 |
| 7598405 | Method for the distillative processing of tetrahydrofuran The present invention provides a process for distillatively purifying tetrahydrofuran in the presence of a polar solvent. ... | 10/06/2009 |
| 7465816 | Production of tetrahydrofuran from 1,4-butanediol Provided is a method for the production of tetrahydrofuran (THF) from 1,4-butanediol (BDO) using a zirconium sulfate (Zr(SO4)2.nH2O) catalyst. The method of the present invention can achieve high-yield production of tetrahydrofuran v... | 12/16/2008 |
| 7396945 | Method of preparing tetrahydrofuran The present invention relates to a process for preparing tetrahydrofuran from 1,4-butandiol. According to the process in the present invention, a metal sulfate catalyst selected from the group consisting of aluminum sulfate, nickel sulfate, ferrous sulfate and chrom... | 07/08/2008 |
| 7351311 | Method for purifying tetrahydrofuran by distillation Crude water-containing tetrahydrofuran is purified by passing the crude tetrahydrofuran through three distillation columns, withdrawing water from the bottom of the first column, recycling water-containing tetrahydrofuran from the top of the second column into the f... | 04/01/2008 |
| 7276570 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These compositions comprise at least one polymer having a plurality of amide linkages and a plurality of anionic moieties attached thereto. These co... | 10/02/2007 |
| 7265195 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These compositions comprise at least one polymer having a plurality of amide linkages and a plurality of cationic moieties attached thereto. These c... | 09/04/2007 |
| 7256249 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. The compositions comprise at least one regioselective polyisocyanate having an asymmetric structure and comprising at least a first NCO group and a ... | 08/14/2007 |
| 7253242 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable materials are presently disclosed. The materials have a rebound height percentage of greater than 60% and are formed from compositions comprising at least one resilient polyamine polydiene and/or ... | 08/07/2007 |
| 7253245 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These elastomer compositions comprise reaction products of polyisocyanates and telechelic polymers having isocyanate-reactive end-groups such as hyd... | 08/07/2007 |
| 7230144 | Methods of making intermediates from polyhydroxyalkanoates Methods of forming intermediates from PHAs are disclosed. ... | 06/12/2007 |
| 7172989 | Catalytic hydrogenation over rhenium-containing catalysts supported on activated carbon In a process for preparing alcohols by catalytic hydrogenation of carbonyl compounds over a catalyst comprising rhenium on activated carbon, the catalyst used comprises rhenium (calculated as metal) in a weight ratio to the activated carbon of from 0.0001 to 0.5, pl... | 02/06/2007 |
| 7157545 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These elastomer compositions comprise reaction products of polyisocyanates and telechelic polymers having isocyanate-reactive end-groups such as hyd... | 01/02/2007 |
| 7148318 | Method for producing polytetrahydrofurane having a low color indices The invention provides a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, their monoesters or diesters and the monoesters or diesters of polytetrahydrofuran having a low color number in the presence of a catalyst, which comprises converting cru... | 12/12/2006 |
| 7138477 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These elastomer compositions comprise reaction products of polyisocyanates and telechelic polymers having isocyanate-reactive end-groups such as hyd... | 11/21/2006 |
| 7138475 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These elastomer compositions comprise at least one amine-terminated polyamide and at least one isocyanate-containing prepolymer. These elastomer com... | 11/21/2006 |
| 7138476 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These compositions comprise at least one fatty compound chosen from fatty polyamines and fatty polyamine telechelics. These elastomer compositions c... | 11/21/2006 |
| 7115703 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable compositions are presently disclosed. These compositions comprise reaction products of polyacids and polyamines. The polyacid is chosen from polymerized fatty polyacids and polyacid telechelics. T... | 10/03/2006 |
| 7105628 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These elastomer compositions comprise reaction products of polyisocyanates and telechelic polymers having isocyanate-reactive end-groups such as hyd... | 09/12/2006 |
| 7105623 | Compositions for golf equipment Golf balls comprising thermoplastic, thermoset, castable, or millable elastomer compositions are presently disclosed. These elastomer compositions comprise at least one poly(urethane-co-urea) prepolymer and at least one curative. These elastomer compositions can be ... | 09/12/2006 |
| 7105624 | Golf balls comprising polyaspartic esters A golf ball comprising a core and at least one layer formed about the core is disclosed. The layer may be composed of a material formed from reactants comprising at least one polyisocyanate and at least one polyaspartic ester, such as N,N′-di(ethylmaleate-amino)-d... | 09/12/2006 |
| 7101951 | Compositions for golf equipment A golf ball comprising at least one thermoplastic, thermoset, castable, or millable material formed from a composition comprising at least one telechelic polycarbonate having a generic structure of: where R1... | 09/05/2006 |
| 7098274 | Compositions for golf equipment A golf ball comprising at least one thermoplastic, thermoset, castable, or millable material formed from a composition comprising at least one telechelic polycarbonate copolymer formed from at least one polyol telechelic and at least one carbonate-forming compound; | 08/29/2006 |
| 7098349 | Method for producing tetrahydrofuran The invention relates to a process for the continuous preparation of THF by reaction of a 1,4-butanediol-containing reaction mixture over a heteropolyacid catalyst which has not been predried, wherein the reaction mixture comprises 2-(4-hydroxybutoxy)tetrahydrofuran... | 08/29/2006 |
| 7041752 | Catalyst and method for the production of polytetrahydrofuran Polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer, which is in the form of shaped catalyst bodies or catalyst parti... | 05/09/2006 |
| 7019155 | Hydrogenation of tetrahydroxybutane to tetrahydrofuran Disclosed is a method for the hydrogenation of tetrahydroxybutane in the presence of supported rhenium catalysts and an acid to form tetrahydrofuran and its precursors. ... | 03/28/2006 |
| 6949617 | Golf balls comprising chiral diols or chiral cyclic ethers A golf ball comprising a core and a cover, wherein the core or the cover comprises a thermoplastic or thermoset composition comprising a polyurethane prepolymer formed from a reactant A comprising an isocyanate; and a reactant B comprising a polyether polyol having ... | 09/27/2005 |
| 6906228 | Method for catalytic hydrogenation on rhenium-containing active carbon carrier catalysts In a process for preparing alcohols by catalytic hydrogenation of carbonyl compounds over a catalyst comprising rhenium on activated carbon, the catalyst used comprises rhenium (calculated as metal) in a weight ratio to the activated carbon of from 0.0001 to 0.5, pl... | 06/14/2005 |
| 6852869 | Method for the production of polytetrahydrofuran with low color index In a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers having a low color number, the polymers obtained by cationic polymerization of tetrahydrofuran are hydrogenated in the presence of a macroporous, sup... | 02/08/2005 |
| 6844452 | Process for the co-production of aliphatic diols and cyclic ethers A process for the co-production of a diol product (e.g. butane-1,4-diol) and a cyclic ether (e.g. tetrahydrofuran) by hydrogenation of an aliphatic diester or lactone feedstock (e.g. dimethyl or diethyl maleate), which contains a minor amount of acidic material, suc... | 01/18/2005 |
| 6700003 | Process for producing a saturated cyclic ether A method for producing a saturated cyclic ether from a fatty acid ester of an , δ-diol stably in high yield over a long period of time, is presented. It is a process for producing a saturated cyclic ether, which comprises reacting a mono- and/or d... | 03/02/2004 |
| 6593481 | Hydrogenation of 3,4-tetrahydrofurandiol to tetrahydrofuran Disclosed is a method whereby 3,4-tetrahydrofurandiol is hydrogenated in the presence of Rh, Re, Pd, Ru and Ni catalysts, optionally supported, to form tetrahydrofuran and its precursors.... | 07/15/2003 |
| 6521765 | Process for the preparation of 3-methyltetrahydrofuran Disclosed is a process for the preparation of 3-methyltetrahydrofuran (MeTHF) from 3-(hydroxymethyl)tetrahydrofuran (HOMeTHF) by contacting HOMeTHF with hydrogen in the presence of an acidic, supported catalyst comprising a Group VIII metal.... | 02/18/2003 |
| 6429321 | Depolymerization of polytetrahydrofuran derivatives The invention discloses a method for depolymerization of a mixture containing polytetrahydrofuran derivatives, including heating the mixture comprising polytetrahydrofuran derivatives at 100-250° C. in the presence of a ଲ-zeolite catalyst to obtain... | 08/06/2002 |
| 6355814 | Process for the preparation of 3-hydroxymethyl tetrahydrofuran The present invention relates to a catalytic process for the preparation of 3-hydroxymethyl tetrahydrofuran of formula IV ##STR1## with hydroformylation as one of the key steps. The process comprises reacting 9-hydroxymethyl-7,12-dioxaspiro[5,6]dodecane o... | 03/12/2002 |
| 6288245 | Process for the production of tetrahydrofuran and gammabutyrolactone A two-stage process for producing tetrahydrofuran and gammabutyrolactone in varying proportions from maleic, succinic anhydride or fumaric acid esters, by vapor phase hydrogenation. The first stage occurs on a copper-based catalyst to produce a mixture of... | 09/11/2001 |
| 6262280 | Shilov-type reactions The functionalization of compounds containing carbon-hydrogen bonds utilizing platinum compounds in Shilov-type reactions is improved by using hydrogen peroxide or selected Pt[IV] compounds as an oxidant.... | 07/17/2001 |
| 6204399 | Process and arrangement for producing tetrahydrofuran Process and arrangement for producing tetrahydrofuran from a hydrous butane diol solution contaminated by light volatile, organic compounds, comprising the following process stages: a) Distillative removal (K1) of the light volatile, organic compounds con... | 03/20/2001 |
| 6201137 | Process for purifying tetrahydrofurans used as starting material for polyether polyols Tetrahydrofurans suitable for use as starting materials in the synthesis of polyether polyols without causing coloration in the product polyether polyols can be obtained by contacting crude tetrahydrofurans with a mineral acid or a strongly acidic cation-... | 03/13/2001 |
| 6169189 | Process for preparing tetrahydrofuran from dialkoxybutenes A process for preparing tetrahydrofuran, which comprises reacting 1,4-butenediol diethers of the formulae I and/or II RO--CH2 --CH.dbd.CH--CH2 --OR I RO--CH2 --CH2.dbd.CH--CH.sub.2 --OR II, where the R radicals can be i... | 01/02/2001 |
| 6159345 | Method and apparatus for recovering and/or recycling solvents A method and apparatus for recycling and recovering potentially explosive solvents includes providing a contaminated solvent to a distillation tank, vaporizing the solvent in the distillation tank, thereby producing solvent vapor, condensing the solvent v... | 12/12/2000 |
