Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
PatentStorm News
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 |
| 7420071 | Thermally stable surfactants and compositions and methods of use thereof There are provided novel thermally stable surfactants for use with fillers in the preparation of polymer composites and nanocomposites. Typically, surfactants of the invention are urethanes, ureas or esters of thiocarbamic acid having a hydrocarbyl group of from 10 ... | 09/02/2008 |
| 6781004 | Process for the preparation of cis-6-hexadecenoic acid The invention relates to a process for the preparation of cis-6-hexadecenoic acid of the formula I, which comprises reacting a1) a triphenylphosphonium salt of the formula II, R1 | 08/24/2004 |
| 6215009 | Manufacture of cycloalkenylpolyene esters The invention provides a process for the manufacture of a retinyl acylate of the formula I: ##STR1## wherein R1 is an optionally substituted C1-23 -alkyl, a C2-23 -alkenyl having 1 to 5 double bonds, an optionally aromatic... | 04/10/2001 |
| 6124485 | Process for producing 13-cis retinoic acid The process of the present invention relates to a process for producing 1 3-cis retinoic acid. The process of the present invention involves reacting a Wittig salt in a solvent with a butenolide in the presence of a weak base and a Lewis acid.... | 09/26/2000 |
| 5719313 | Carbonylation catalyst system and a process for the carbonylation of acetylenically unsaturated compounds The invention relates to a novel carbonylation catalyst system and a process for the carbonylation of acetylenically unsaturated compounds, whereby a feedstock, comprising an acetylenically unsaturated compound and a relatively minor amount of an 1,2-alka... | 02/17/1998 |
| 5455373 | Method of producing perfluorocarbon halides A method of producing perfluorocarbon halides in a one-pot reaction is described. The method employs a perfluorocarbon acid, a first halogenating agent and a second halogen which drives the reaction forward. Novel perfluorocarbon halides and a direct meth... | 10/03/1995 |
| 5436356 | Carbonylation process A process for the carbonylation of ethylenically unsaturated compounds by reaction with carbon monoxide and a co-reactant in the presence of a substantially non-acidic catalyst system based on a palladium compound and a bidentate ligand of the formula R | 07/25/1995 |
| 5258546 | Carbonylation catalyst system The invention relates to a catalyst system, which comprises a source of a Group VIII metal and a polyphosphine. The invention further relates to a process for the preparation of alpha, beta-olefinically unsaturated compounds utilizing this catalyst system... | 11/02/1993 |
| 5218143 | Process for preparing carboxylic acids An improved liquid-phase process for preparing carboxylic acids having (n+1) carbon atoms by rhodium catalyzed carbonylation of an alcohol having n carbon atoms is provided. The process is particularily suitable for preparing acetic acid from methanol in ... | 06/08/1993 |
| 5210280 | Process for the preparation of alkanedioic acid derivatives A process for the preparation of alkanedioic acid derivatives comprising reacting an alkenoic acid derivative with carbon monoxide and a nucleophilic compound having a mobile hydrogen atom in the presence of a catalyst system comprising a source of a Grou... | 05/11/1993 |
| 5191096 | Process for producing ω-hydroxy fatty acids ω-Hydroxy fatty acids usable for the synthesis of medicaments, perfumes and polymers are produced by subjecting an alkali or alkaline earth metal salt of long-chain dicarboxylic acid monoester to a reduction with a borohydride compound or catalytic hydro... | 03/02/1993 |
| 5185457 | Process for the continuous production of fatty acid soaps A process for the continuous production of fatty acid soaps by reaction with solid metal oxides, hydroxides, hydrogen carbonates and carbonates of Mg, Ca, Ba, Pb, Al, Zn, Co, Fe, Cd and Zr, in which the fatty acids are subjected to a rotational movement b... | 02/09/1993 |
| 5180742 | Quinone derivatives, their production and use Quinone derivatives of the general formula: ##STR1## (wherein R1 and R2 are the same or different, and independently are a hydrogen atom or a methyl or methoxy group, or R1 and R2 combine with each other to... | 01/19/1993 |
| 5179225 | Carbonylation catalyst system A carbonylation catalyst system, which comprises: a) a source of a Group VIII metal; b) a source of a phosphine having an aromatic substituent containing an imino nitrogen atom; c) a source of protons; and d) a source of an alkylsulfonate anion, and the use of such... | 01/12/1993 |
| 5177228 | Process for hydroformylation Hydroformylation process, wherein an olefinic compound is reacted with hydrogen and carbon dioxide in the presence of a Group VIII precious metal complex catalyst containing an organic phosphorus compound as a ligand, the process being characterized by us... | 01/05/1993 |
| 5081292 | Preparation of ଲ, γ-unsaturated carboxylic acids ଲ, γ-Unsaturated carboxylic acids, e.g., 3-hexene-1,6-dioic acid, are selectively prepared by carbonylating (with carbon monoxide) an allyl alcohol, e.g., a butenediol, at an elevated temperature and under superatmospheric pressure, in the presence... | 01/14/1992 |
| 5041642 | Preparation of ଲ, γ-unsaturated carboxylic acids ଲ,γ-Unsaturated carboxylic acids are facilely prepared by carbonylating a conjugated diene with carbon monoxide in the presence of (i) water, (ii) a halogenated hydracid, (iii) a palladium catalyst comprising palladium metal or supported palladium ... | 08/20/1991 |
| 5028734 | Process for the selective preparation of alkenecarboxylic acid derivatives A process for the selective carbonylation of a conjugated diene by contacting with carbon monoxide in the presence of a hydroxyl-group-containing compound such as water, alcohol, phenol or carboxylic acid in liquid phase using a catalyst system formed by ... | 07/02/1991 |
| 5004568 | Carbonylation of allylic ethers to esters A method is disclosed for the production of esters by reaction of an allylic ether with carbon monoxide in the presence of a catalytically effective amount of a Group VIII noble metal catalyst and a Group IB metal halide to obtain esters. The Group IB met... | 04/02/1991 |
| 4960926 | Process for the carbonylation of olefinically unsaturated compounds with a palladium catalyst Process for the carbonylation of olefinically unsaturated compounds with carbon monoxide in the presence of a hydroxyl-group-containing compound, a palladium catalyst, an organic phosphine, an acid with a pKa value | 10/02/1990 |
| 4945179 | Process for the preparation of esters of carboxylic acids and catalytic system for use therein Process for the preparation of esters of carboxylic acids by contacting an olefinically unsaturated compound with CO and an alcohol, in the presence of (a) a ruthenium compound and (b) an iodide salt, LiBr and/or an onium bromide, with a molar ratio of CO... | 07/31/1990 |
| 4940787 | Process for the carbonylation of acetylenic unsaturated compounds A method for the preparation of alpha,beta-olefinic unsaturated compounds by means of carbonylation of acetylenic unsaturated compounds with carbon monoxide in the presence of a hydroxy-containing compound in liquid phase, accomplished in the presence of ... | 07/10/1990 |
| 4927967 | Production of carboxylic acids from organic formate esters using rhodium complex catalysts A process for the production of organic carboxylic acids by the catalytic reaction of organic formate esters in contact with carbon monoxide and a homogeneous catalyst system of rhodium metal atom, a phosphorus containing ligand in which there is present ... | 05/22/1990 |
| 4902822 | Process for the preparation of carboxylic acids or esters thereof A process for the preparation of carboxylic acids or of esters thereof by contacting an olefinically unsaturated compound with CO in the presence of water or an alcohol, respectively, and of a catalytic system prepared by combining a ruthenium compound an... | 02/20/1990 |
| 4786443 | Process for the carbonylation of olefinically unsaturated compounds with a palladium catalyst Process for the carbonylation of olefins with CO in the presence of water, an alcohol and/or a carboxylic acid in the presence of a catalyst composition based on (a) a Pd compound, (b) a protonic acid, and (c) a phosphine PR1 R2 R3 | 11/22/1988 |
| 4743401 | Conversion of an allylic ether to its corresponding acetal A process for converting an allylic ether to its corresponding acetal is disclosed. In this process an allylic ether is contacted with an organic hydroxy compound and a catalytically effective amount of a cobalt compound to produce the corresponding aceta... | 05/10/1988 |
| 4670582 | Process for the preparation of unsaturated carboxylate esters Process for the preparation of carboxylate esters of alpha-ethylenically unsaturated alcohols by reacting an ethylenically unsaturated compound with carbon monoxide and an enolizable ketone in the presence of a catalytic system formed by combining a palla... | 06/02/1987 |
| 4659518 | Preparation of carboxylic acids A carboxylic acid, such as acetic acid, is prepared by carbonylation of a hydrocarbyl alcohol, such as methanol, by the use of a molybdenum-nickel or tungsten-nickel co-catalyst in the presence of a promoter comprising an organo-phosphorus compound or an ... | 04/21/1987 |
| 4647691 | Process for preparing ethyl and n-propyl esters of carboxylic acids from methanol, syngas and carboxylic acid using a new catalyst system Ethyl and n-propyl esters of carboxylic acids are prepared in good yield from methanol, syngas and a carboxylic acid by contacting a mixture of the carboxylic acid, carbon monoxide, hydrogen and methanol with a catalyst composition comprising a ruthenium-... | 03/03/1987 |
| 4640802 | Process for the co-production of carboxylic acids and carboxylic acid esters Process for the co-production of carboxylic acids of the general formula R1 --COOH and R2 --COOH and carboxylic acid esters of the general formula R1 --COOCH2 R2 and R2 --COOCH2 ... | 02/03/1987 |
| 4629809 | Process for selectively preparing acetic acid by carbonylation of methanol in the presence of a novel iodide-free catalyst system A process for producing acetic acid is disclosed which comprises reacting methanol with carbon monoxide at an elevated temperature and pressure in the presence of an iodine-free catalyst system wherein the catalyst consists of ruthenium compound, quaterna... | 12/16/1986 |
| 4628113 | Alcohol carbonylation process using a bimetallic cobalt catalyst A process for the preparation of carboxylic acids, alcohols, aldehydes or the secondary products thereof which comprises reacting an alcohol having from one to about twenty carbon atoms with hydrogen and carbon monoxide in the presence of a heterogeneous ... | 12/09/1986 |
| 4625049 | Alcohol carbonylation process using a bimetallic nickel catalyst A process for the preparation of carboxylic acids, alcohols, aldehydes or the secondary products thereof which comprises reacting an alcohol having from one to about twenty carbon atoms with hydrogen and carbon monoxide in the presence of a heterogeneous ... | 11/25/1986 |
| 4625050 | Ether homologation to esters and alcohols using a heterogeneous sulfided catalyst A process for the conversion of dialkyl ethers to homologous carboxylic acid esters and alcohols which comprises reacting a dialkyl ether having from two to about twenty carbon atoms with hydrogen and carbon monoxide in the presence of a heterogeneous sul... | 11/25/1986 |
| 4612390 | Method for producing branched carbonylation products from alpha unsaturated olefins A novel method for producing branched carboxylic acids or esters from alpha-unsaturated olefins is disclosed. Such olefins are reacted with a novel, sterically hindered, ortho substituted phenylphosphine palladium halide catalysts in the presence of water... | 09/16/1986 |
| 4585594 | Preparation of 4-substituted but-3-ene-1-carboxylic acids and their esters 4-Substituted but-3-ene-1-carboxylic acids and their esters R1 R2 C.dbd.CH--CH2 --CO--O--R3 (I, where R1 is an organic radical, R2 is H or R1, or R1 and R2 toget... | 04/29/1986 |
| 4562284 | Process for the preparation of carboxylic acids A process is disclosed for preparation of a carboxylic acid RCOOH wherein R represents certain alkyl, cycloalkyl or aralkyl groups, by heating a formic acid ester HCOOR in the presence of carbon monoxide, a soluble rhodium catalyst and an iodide or bromid... | 12/31/1985 |
| 4558153 | Preparation of carboxylic acids and esters Carboxylic acids having two or more carbon atoms than formic acid, or esters of such carboxylic acids are prepared by reacting either formic acid or an ester of formic acid with an olefin at elevated temperature in the presence of a Group VIB metal cataly... | 12/10/1985 |
| 4540810 | Manufacture of alkanol and glycol esters This invention concerns the improved preparation of alkanol and glycol esters, such as ethylene glycol diesters, by reaction of carbon monoxide and hydrogen in the presence of a catalyst system comprising ruthenium and a quaternary aryl or alkaryl phospho... | 09/10/1985 |
| 4536340 | Process for the preparation of alkyl nonadienoate esters A mixture of 1,3-butadiene, carbon monoxide and a monoalkanol of the general formula ROH in which R is a straight or branched chain alkyl group of from 1 to about 12 carbon atoms is reacted in the presence of catalyst to provide alkyl nonadienoate ester a... | 08/20/1985 |
