Quotables
"If you build a better mousetrap, you will catch better mice."
George Gobel
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 |
| 6203670 | Method for grafting a substituted difluoromethyl group Provided is a process for grafting a substituted difluoromethyl group onto a compound bearing at least one electrophilic substituent, comprising (i) contacting the compound bearing at least one electrophilic substituent with a nucleophilic reagent which c... | 03/20/2001 |
| 6156163 | Reactant, compound and process for the perfluoroalkylation of the nucleophile, and the derivatives obtained A reagent comprising a compound of formula (I): Rf --M(X) (Z)n --Y--R, wherein R is a hydrocarbon radical advantageously having at most 10 carbon atoms and being selected from alkyls and aryls; Rf is a radical of formula I... | 12/05/2000 |
| 6045664 | Process for the photochemical sulphochlorination of gaseous alkanes For manufacturing an alkanesulphonyl chloride by photochemical reaction of an alkane with chlorine and sulphur dioxide, the light source used is a gallium-doped medium-pressure mercury lamp.... | 04/04/2000 |
| 5139628 | Process for the preparation of 4-sulfo-2-chlorobenzoic acid A multi stage process for the conversion of 2-chloro-4-sulphotoluene (SCT) to 2-chloro-4-sulphobenzoic acid (SCUBA). Stage (a) comprises a process S1 for the selective side chain bromination of SCT to 2-chloro-4-sulpho-dibromotoluene (SCDBT) or 2-chloro-4... | 08/18/1992 |
| 4997988 | Oxa-organic sulfur compounds, their preparation and use Oxa-organic sulfur compounds, methods of preparing such compounds and methods of using the compounds as polymer chain length terminating agents are provided. The compounds are prepared by reacting allyl alcohol in the presence of a basic catalyst with a c... | 03/05/1991 |
| 4997535 | Method of manufacturing methanesulfonyl chloride This invention is concerned with the manufacture of methanesulfonyl chloride from a mixture of methane, sulfur dioxide gas and chloride gas under irradiation of light having a wave length of 200~600 nm from a low vapor pressure mercury lamp, a high vapor ... | 03/05/1991 |
| 4837364 | Processes for preparing pentafluoroethoxy- and pentafluoroethylthiobenzene drivatives A process for the preparation of (pentafluoroethoxy)- and (pentafluoroethylthio)benzene derivatives either from phenol, thiophenol or from halobenzene. A halobenzene is reacted with trifluoroethanol or a phenol or a thiophenol is reacted with a compound o... | 06/06/1989 |
| 4765875 | Preparation of sulfonated lubricating agents for leather and furs This invention relates to sulfonated lubricating agents for leather and furs. More specifically, this invention relates to a process for the production of sulfonated lubricating agent for leather and tanned furs consisting of the steps of: (a) sulfochlori... | 08/23/1988 |
| 4735747 | Process and apparatus for the photochemical sulphochlorination of gaseous alkanes Process of preparation of sulphonyl alkane halides by the reaction between an alkane, sulphur dioxide and a halogen, in the presence of ultraviolet light in the gaseous phase; the gaseous mixture of the reactants contains at least 4 moles of SO2 | 04/05/1988 |
| 4654042 | Sulfonated lubricating agents for leather and furs process therefore This invention relates to sulfonated lubricating agents for leather and furs. More specifically, this invention relates to a process for the production of sulfonated lubricating agent for leather and tanned furs consisting of the steps of: (a) sulfochlori... | 03/31/1987 |
| 4604480 | Method for the preparation of sulfones and compounds containing carbon chains having conjugated unsaturation and the compounds resulting from such method A method for the preparation of a first sulfone compound of the formula: ##STR1## wherein Ra is ##STR2## where Rb is Br and Rc is H except that Rb and Rc together may be an electron pair whe... | 08/05/1986 |
| 4587274 | Process for preparation of fluorine-containing compound having carboxyl group Disclosed is a process for the preparation of a fluorine-containing compound having a carboxyl group, which comprises irradiating a fluorine-containing compound having a sulfonyl group with ultraviolet rays in the presence of a nitrogen compound. Accordin... | 05/06/1986 |
| 4448731 | 1,2-Dihalogenoalkylsulfonyl isocyanates and 1,2-di-halogenocycloalkylsulfonyl isocyanates and process for their manufacture Compounds of the formula ##STR1## wherein X is halogen, R1 and R2 are hydrogen, halogen, (halo)alk(en)yl, (halo)alkoxyalkyl or together form an (optionally substituted) alkylene bridge, and R3 is hydrogen, alkyl or ha... | 05/15/1984 |
| 4331821 | Process for the monohalogenation of alkylbenzenes in the -position and new alkylbenzenes monohalogenated in the -position A process for the monohalogenation of alkylbenzenes in the -position is disclosed wherein an alkylbenzene reactant containing a hydrogen atom in the -position is contacted with a halogen and the reaction mixture is withdrawn such that the am... | 05/25/1982 |
| 4257858 | Photochemical method for producing biocidal 2-aryl-1,3-cyclohexanedione compounds 2-Aryl-1,3-cyclohexanedione compounds and their alkali metal and ammonium salts exhibit outstanding herbicidal, miticidal and mite ovicidal activity.... | 03/24/1981 |
| 4242187 | Preparation of alkanes substituted by chlorine atoms and/or sulfochloride groups Alkanes substituted by chlorine atoms and/or sulfochloride groups are prepared by reacting alkanes with chlorine, with or without sulfur dioxide, in a particular throughput ratio, in a reaction chamber inclined to the horizontal, the starting materials be... | 12/30/1980 |
| 4180639 | Fluorosulphonyl oxafluoroalkanes, fluorosulphonyl olefines, _their copolymers and processes for preparation A new class fluorosulphonyl oxafluoroalkanes and of their derivatives is disclosed as well as a process for preparing said products. Furthermore, a new class of fluorosulphonyl olefins, copolymers thereof and a process for preparing same is also disclosed... | 12/25/1979 |
| 4046656 | Photochlorination process for methyl aromatic compounds The rate of photochlorination of methyl aromatic compounds, such as toluene, cresol, xylene, toluenesulfonyl chloride, methylnaphthalene, diphenylmethane, etc., is increased when carried out in the presence of bromine.... | 09/06/1977 |
| 4030994 | Substitutive fluorination of organic compounds Organic compounds having at least one replaceable hydrogen atom are fluorinated in the liquid or solid state by treatment with fluoroxyperfluoroalkanes or fluoroxypentafluorosulfur under the influence of a free radical initiator.... | 06/21/1977 |
| 4004572 | Solar energy collection and retrieval employing reversible photochemical isomerization A process for photochemical collection, storage, and retrieval of solar energy, including solar energy in the visible and near-infrared light spectrum, comprising: exposing to solar radiation of a trans-isomer of particular geometrically isomerizable comp... | 01/25/1977 |
