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| Number | Title | Issue Date |
| 7214833 | Process for preparing perfluoropolyethers A process to obtain perfluoropolyethers comprising: a) synthesis of peroxidic perfluoropolyethers by one of the following reactions: al) TFE photooxidation, in solvents selected between perfluorocarbons and (mono)h... | 05/08/2007 |
| 7041409 | Low equivalent weight ionomer An ionomer and a process for forming the ionomer such that the ionomer has (1) low equivalent weight; below 950, preferably between 625 and 850, and most preferably between about 700 and about 800; and (2) high conductivity, (greater than 0.15 S/cm). In an alternati... | 05/09/2006 |
| 7022428 | Low equivalent weight ionomer An ionomer and a process for forming the ionomer such that the ionomer has (1) low equivalent weight; below 950, preferably between 625 and 850, and most preferably between about 700 and about 800; and (2) high conductivity, (greater than 0.15 S/cm). In an alternati... | 04/04/2006 |
| 7019177 | Process for preparing fluorohalogenethers A process for preparing (per)fluorohalogenethers having general formula (II): R′CF2OCFA-CA′F2 (II) wherein:— A and A′, equal to or different from each other, are H, Cl or Br bu... | 03/28/2006 |
| 6989467 | Microwave induced process for the preparation of substituted 4-vinylphenols The present invention relates to “a microwave induced process for the preparation of 4-vinylphenols or its derivatives” in which commercially important FEMA GRAS approved perfumery and flavouring vinylphenols (i.e. hydroxystyrenes) namely 4-vinylguaiacol (FEMA G... | 01/24/2006 |
| 6936654 | Additives for hydrogenated resins Additives for hydrogenated resins obtainable by using the following components: a) bifunctional perfluoropolyethers having a —COOR end group, optionally in admixture with monofunctional perfluoropolyethers having a —COOR end gr... | 08/30/2005 |
| 6936722 | Polyhalogenated ethers (Per)haloethers having formula: X—(Rf)L—O—CF2CF2—O—CX1X2—CFX3X4 (I), process for obtaining them and hypofluorites usable in the synthesis of said (per)h... | 08/30/2005 |
| 6551468 | Preparation of isoflurane by reaction of 2,2,2-trifluoroethyl difluoro-methyl ether and chlorine in added water, at low temperatures and/or at higher conversions A process for preparing isoflurane (1-chloro-2,2,2-trifluoroethyl difluoromethyl ether) by reacting PFE (2,2,2-trifluoroethyl difluoromethyl ether) with chlorine in the presence of ultraviolet light and added water, at a low temperature and/or at a high c... | 04/22/2003 |
| 5994110 | Methods for direct synthesis of compounds having complementary structure to a desired molecular entity and use thereof Compounds which possess a complementary structure to a desired molecule, such as a biomolecule, in particular polymeric or oligomeric compounds, which are useful as in vivo or in vitro diagnostic and therapeutic agents are provided. Also, various methods ... | 11/30/1999 |
| 5854370 | Epoxy resin stilbenes and process for producing the same by photoisomerization The invention provides a cis-stilbene type epoxy resin having lower melting point and lower viscosity than the trans-stilbene type epoxy resin hitherto known. The stilbene type epoxy resin has a cis-isomer content of essentially 100%, or in the alternativ... | 12/29/1998 |
| 5783789 | Process for preparing peroxidic perfluoropolyethers Tetrafluoroethylene oxidation process comprising the step of oxidizing tetrafluoroethylene in solution at temperatures between -80° C. and -50° C. in the presence of ultraviolet radiation, oxygen and perfluoroethane (125) as solvent to obtain peroxidic ... | 07/21/1998 |
| 5777291 | Process for preparing peroxidic perfluoropolyethers Tetrafluoroethylene oxidation process at temperatures comprised between -80° C. and -40° C. in the presence of UV radiations and pentafluoropropane as solvent.... | 07/07/1998 |
| 5620569 | Process for the photooxidation of terpene olefins In the photooxidation of terpene olefins, fewer by-products and higher conversion rates are obtained if a very high irradiation intensity is chosen.... | 04/15/1997 |
| 5484932 | Halogenation processes in advantageous solvents, and novel bistrifluoromethyl-polyfluoroalkoxybenzenes Compounds such as ##STR1## wherein R is F, CF3, CF2 H, CHF CF3 or CF2 CF3, as well as related compounds containing chlorine, are used as solvents in halogenation processes.... | 01/16/1996 |
| 5446211 | Chlorination of difluoromethyl methyl ether The synthesis of fluorinated dimethyl ethers of the formula CF2 HOCClx Fy H3-(x+y) wherein x is 0, 1 or 2; y is 1, 2 or 3; and wherein (x+y) is 1, 2 or 3. The process involves chlorination of methyl difluorometh... | 08/29/1995 |
| 5436401 | 22-oxacholecalciferol derivative and process for preparing the same A 22-oxacholecalciferol derivative represented by formula (I): ##STR1## wherein R1 represents a hydrogen atom or a hydroxyl group; and R2 and R3, which may be the same or different, each represent a lower alkyl group ... | 07/25/1995 |
| 5416244 | Preparation of isoflurane An improved process for the production of isoflurane is disclosed. Isoflurane is formed by the exhaustive chlorination of 2,2,2-trifluoroethyl difluoromethyl ether with chlorine gas. The reaction mixture, preferably without purification or refining, is tr... | 05/16/1995 |
| 5354922 | Perfluoropolyoxyalkylene endowed with a high viscosity and a low peroxide oxygen content, and process for preparing them Peroxy perfluoropolyoxyalkylenes are prepared with high yields by carrying out the photo-oxidation of tetrafluoroethylene with molecular oxygen, by means of ultraviolet radiations, operating in the presence of pentafluorochloroethane as a solvent for tetr... | 10/11/1994 |
| 5350497 | Production of perfluoro(alkyl vinyl ethers) Disclosed herein is a process for making perfluoro(alkyl vinyl ethers) by fluorination with elemental fluorine of selected novel partially fluorinated (di)chloroethyl ethers, followed by dehalogenation to the corresponding perfluoro(alkyl vinyl ether). Th... | 09/27/1994 |
| 5288376 | Preparation of perfluorooligoether iodides A perfluorooligoether iodide is prepared by exposing a perfluoropolyether carboxylic iodide to UV light.... | 02/22/1994 |
| 5279870 | Cured epoxy resins exhibiting nonlinear optical properties The present invention is directed to a novel epoxy polymeric composition resulting from reacting (A) at least one compound containing an average of more than one epoxide group per molecule with (B) at least one curing agent for component (A). At least a p... | 01/18/1994 |
| 5278342 | Vapor phase chlorination of difluoromethyl methyl ether The synthesis of fluorinated dimethyl ethers of the formula CF2 HOCClx Fy H3-(x+y) wherein x is 0, 1 or 2; y is 1, 2 or 3; and wherein (x+y) is 1, 2 or 3. The process involves chlorination of methyl difluorometh... | 01/11/1994 |
| 5258110 | Process for preparing peroxidic perfluoropolyethers A process is disclosed for preparing peroxidic perfluoropolyethers containing perfluoroalkylenoxy units (CF2 --CF2 O) and (CF2 O), which is characterized in that tetrafluoroethylene and oxygen are reacted in a solvent at a... | 11/02/1993 |
| 5198593 | Process for purification of ethylene compound having fluorine-containing organic group A process for purifying an ethylene compound having a fluorine-containing organic group (fluorine-containing ethylene compound) by mixing the fluorine-containing ethylene compound with an alkali metal or alkaline earth metal reducing agent, and subjecting... | 03/30/1993 |
| 5185474 | Synthesis of fluorinated dimethyl ethers A novel process is disclosed for the synthesis of fluorinated dimethyl ethers of the formula CF2 HOCClX FY H3-(X+Y) wherein X and Y are each independently 0, 1, 2 or 3 and wherein the total X+Y is 2 or 3. The pr... | 02/09/1993 |
| 5179188 | Crosslinkable fluorinated aromatic ether composition Fluorinated polyether compositions having reactive end gorups, such as ##STR1## can be crosslinked to produce cured films useful as dielectrics for microelectronic applications. Other reactive end groups such as allyl, benzocyclobutyl, N-phenylmaleim... | 01/12/1993 |
| 5143589 | Perfluoropolyethers containing a halogen different from fluorine and having an acid end group Perfluoropolyethers having an acid end group of the type of acyl fluoride (or chloride) or a carboxylic group or derivatives thereof, the other end group being a perfluoroalkyl containing one or two halogen atoms different from fluorine, are prepared by p... | 09/01/1992 |
| 5104911 | Cross-linked products with the structure of perfluoropolyethers having functional groups Cross-linked macromolecular products having the structure of perfluoropolyethers in which the cross-linking is due to C--C links between carbon atoms of different perfluoropolyether chains, said cross-linked products being obtained by treatment by means o... | 04/14/1992 |
| 5104503 | Photochemical dimerization of organic compounds At least one of selectivity and reaction rate of photosensitized vapor phase dimerizations, including dehydrodimerizations, hydrodimerizations and cross-dimerizations of saturated and unsaturated organic compounds is improved by conducting the dimerizatio... | 04/14/1992 |
| 5000830 | Process for the production of perfluoropolyethers substantially constituted by perfluorooxyethylene and perfluorooxypropylene units Improved process for producing perfluoropolyethers prevailingly constituted by repeating units --CF2 CF2 O-- and ##STR1## with perfluoroalkyl terminal groups, wiith a mutual ratio of the above C3 /C2 units ... | 03/19/1991 |
| 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 |
| 4874488 | Photochemical dimerization and functionalization of alkanes, ethers, primary and secondary alcohols, phosphine oxides and silanes The space-time yield and/or the selectivity of the photochemical dimerization of alkanes, ethers, primary and secondary alcohols, phosphine oxides and primary, secondary and tertiary silanes with Hg and U.V. light is enhanced by refluxing the substrate in... | 10/17/1989 |
| 4859299 | Novel perfluoropolyether and process for producing the same A novel perfluoropolyether containing 0.1 to 10% by weight of halogen atoms as bonded in the molecule is obtained by reacting tetrafluoroethylene with oxygen in a fluorinated solvent or a chlorofluorinated solvent under ultraviolet irradiation in the pres... | 08/22/1989 |
| 4853097 | Perfluoropolyethers free from peroxidic oxygen and containing perfluoroepoxy groups positioned along the perfluoropolyether chain, and their derivatives Perfluoropolyethers having fluorinated epoxy groups positioned along their perfluoropolyether chain, and free from peroxidic oxygen, are obtained by means of a low-temperature oxidation process, in the liquid phase, with molecular oxygen and in the presen... | 08/01/1989 |
| 4849076 | Continuous oxidation method A method for oxidizing a substrate which is oxidizable by singlet oxygen is discolded. The first step of the method comprises establishing a flow to and from each of a plurality of successive closed zones, each of which zones (a) contains a quantity of a ... | 07/18/1989 |
| 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 |
| 4820588 | Shaped articles of polyfluoropolyethers having pendant perfluoroalkoxy groups Normally liquid peroxidic poly(perfluorooxyalkylene) compositions comprising a mixture of peroxidic poly(perfluorooxyalkylene) compounds, derivatives of the poly(perfluorooxyalkylene) compositions comprising a mixture of non-peroxidic polyfluoropolyether ... | 04/11/1989 |
| 4767873 | Helical metallocene oligomers and a method for their preparation The invention describes a helicene compound having the structure ##SPC1## which contains seven six-membered conjugated aromatic rings capped by two five-membered rings which do not superimpose on each other. The invention also describes a helical metallocene o... | 08/30/1988 |
| 4725342 | Photochemical dimerization and functionalization of alkanes, ethers, primary alcohols and silanes The space-time yield and/or the selectivity of the photochemical dimerization of alkanes, ethers, primary alcohols and tertiary silanes with Hg and U.V. light is enhanced by refluxing the substrate in the irradiated reaction zone at a temperature at which... | 02/16/1988 |
| 4709100 | Process for the manufacture of mixtures of 3-phenoxybenzyl bromide and 3-phenoxybenzal bromide The present invention relates to a process for the manufacture of mixtures of 3-phenoxybenzyl bromide and 3-pnenoxybenzal bromide using dibromodimethylhydantoin as brominating agent. According to the process, the reaction between the m-phenoxytoluene and ... | 11/24/1987 |
