Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7303089 | Anti-siphon fuel cap and filler tube assembly An improved fuel cap and filler tube assembly for a fuel tank is provided. A spring-biased resilient and compressible closure member in the fuel cap seats inside an inlet opening of the filler tube when the fuel cap is secured to the filler tube. The filler tube inc... | 12/04/2007 |
| 6753451 | Process for the preparation of phenylphenol compounds There is described the preparation of phenylphenol compounds of formula (1) by reaction of a keto compound of formula (3) with dioxolane of formula (4) and with an ammonium compound of formula (5) to from β-aminoketone compound of formul... | 06/22/2004 |
| 6391925 | Liquid phenolic composition A liquid composition of phenolic compounds can be formed in the substantial absence of a solvent and a surfactant. This composition includes at least one substituted phenol and a halo-substituted phenol. In one embodiment, the composition includes benzylc... | 05/21/2002 |
| 5969147 | Substituted biphenyloxazolines New pesticidal substituted biphenyloxazolines of the formula (I) in which A, B, X, m and n have the meanings stated in the description, and new intermediates therefor.... | 10/19/1999 |
| 5847234 | Process for the preparation of 4-hydroxybiphenyl 4-Hydroxybiphenyl is obtained in non-thixotropic form if a reaction mixture which is obtained by alkaline hydrolysis of biphenyl-4-sulfonic acid and contains 4-hydroxybiphenyl is heated at elevated pressure at above 115° C. and at a pH from 0 to below 6.... | 12/08/1998 |
| 5304689 | Stabilization of color in production of paracumylphenol using hypophosphorous acid Para-cumylphenol is continuously produced by the reaction of purified phenol and alpha-methylatyrene in the presence of an acidic catalyst and an effective amount of hypophosphorous acid (H3 PO2) for stabilizing the color and UV abso... | 04/19/1994 |
| 5248840 | Process for the preparation of hydrooxydiphenyls To prepare hydroxydiphenyls, a compound or a mixture of several compounds consisting of completely or partly hydrogenated hydroxydiphenyl is dehydrogenated catalytically in the gas phase, a catalyst being employed which comprises, as the active constituen... | 09/28/1993 |
| 5245086 | Hydroxylation of phenols/phenol ethers The phenols/phenol ethers are hydroxylated by reaction with hydrogen peroxide, in the presence of a catalytically effective amount of (a) at least one alkali metal or alkaline earth metal salt of a protonic acid having a pKa in water of less than -0.1 and... | 09/14/1993 |
| 5235116 | Process for the preparation of 2-(1-phenylethyl)hydroquinone and 2-(1-phenylethyl)hydroquinone diacetate Provided is an improved process for preparing 2-(1-phenylethyl)hydroquinone and its diacetate salt. In this process, the differential solubility of product and starting materials hydroquinone and styrene in non-polar organic solvents is utilized to provid... | 08/10/1993 |
| 5210330 | Process for the preparation of phenylhydroquinone Disclosed is an improved process for the preparation of phenylhydroquinone wherein hydroquinone is first alkylated with cyclohexene to produce cyclohexylhydroquinone which is then dehydrogenated to obtain phenylhydroquinone. The improvement comprises carr... | 05/11/1993 |
| 5196605 | Process for the preparation of pure 4,4'-dihydroxybiphenyl In a process for the preparation of 4,4'-dihydroxybiphenyl of high purity 4,4'-dibromobiphenyl is hydrolized in the presence of a copper compound catalyst, the insoluble materials comprising the catalyst is filtered off from the product mixture, 4,4'-dihy... | 03/23/1993 |
| 5185475 | Process for preparing paracumylphenol A method for preparing paracumylphenol in a highly selective manner which comprises a. reacting alpha methylstyrene with a purity greater than about 99.5 wt. % with a molecular excess of phenol having a purity greater than about 99.95 wt. % in the contact... | 02/09/1993 |
| 5177258 | Method of production of biaryl derivatives Biaryl derivatives are produced by coupling an aryl halide in an aqueous alkaline solution in the presence of a palladium catalyst, using formic hydrazide as the reducing agent.... | 01/05/1993 |
| 5159082 | Process for producing aromatic compound A process for producing an aromatic compound is disclosed, which comprises coupling an aromatic sulfinic acid or a salt thereof with an aromatic halogen compound having at least one halogen atom attached to the carbon atom of the aromatic nucleus thereof ... | 10/27/1992 |
| 5149888 | Hydroxylation of phenols/phenol ethers The phenols and phenol ethers, e.g., phenol itself, are effectively hydroxylated by reacting hydrogen peroxide therewith, in the presence of a catalytically effective amount of titanium dioxide.... | 09/22/1992 |
| 5146025 | Naphthalene compounds A compound represented by the formula: ##STR1## and a compound represented by the formula: ##STR2## wherein R is C1 -C3 alkyl or C1 -C3 alkoxy, which is an intermediate for producing the above compound... | 09/08/1992 |
| 5105029 | Process for recovering a lower alcohol from a catechol-lower alcohol reaction product solution A lower alcohol, for example, ethyl alcohol, is recovered from a reaction mixture resulted from a reaction of catechol with a lower alcohol in such a manner that the reaction mixture is distilled and separated into a distilled light vapor fraction compris... | 04/14/1992 |
| 5093514 | Base-catalyzed dehydration of substituted cis-1,2-dihydroxycyclohexa-3,5-dienes A process for dehydrating compounds of the formula ##STR1## where --R is --CH.dbd.CH2, --C.tbd.CH --C.tbd.N or ##STR2## in an aqueous solution thereof is disclosed. In the case where R is --CH.dbd.CH2 or --C.dbd.CH, the tem... | 03/03/1992 |
| 5059345 | Optically active compound and chiral liquid crystal composition containing the same An optically active compound represented by the general formula (I) of: R--Z--COO--(Ph)k --Ph(Y)--CO--(CH2)m C*HE L (1) In the general formula (I); R is an alkyl or alkoxy group having 4 to 22 carbon atoms; Z is the one selected fro... | 10/22/1991 |
| 5041692 | Process for alkylation of phenols A process for alkylation of phenols comprising letting a phenol react with a vinyl-aromatic hydrocarbon substituted in the vinyl group, in the presence of an organic solvent and of an acid catalyst in an aqueous solution, and of a polymerization inhibitor... | 08/20/1991 |
| 4960957 | Preparation of phenylhydroquinone A process for the preparation of phenylhydroquinone by the reaction of a mixture of a benzenediazonium salt, hydroquinone and water while maintaining the pH in the range of about 3 to about 9.... | 10/02/1990 |
| 4871470 | Cyclohexane derivatives Cyclohexane derivatives of formula I ##STR1## wherein R is an alkyl group which has 1-12 C atoms and in which one or two non-adjacent CH2 groups can also be replaced by O, --CO--O-- or --OCO--, A1 and A2 each independ... | 10/03/1989 |
| 4798911 | Catalyst composition and method for selective dehydrogenation A method for selective dehydrogenation of a compound, comprising contacting a compound of the formula ##STR1## wherein each R1, R2, R3 and R4 is independently selected from the group consisting of H, (C | 01/17/1989 |
| 4729977 | Supported catalyst, process for its preparation and its use for the preparation of hydroxydiphenyl A supported catalyst containing rhodium and compounds of chromium, manganese, alkali metals and, if appropriate, compounds of sulphur is prepared by first applying compounds of chromium and manganese to the catalyst support, subsequently heating the catal... | 03/08/1988 |
| 4670581 | Biphenyl compounds and process for producing the same New biphenyl compounds and a process for producing them are provided. These new compounds have an acyloxy group in the 2- or 4-position of the biphenyl and an acyl hydroxyalkyl, hydroxyalkenyl or vinyl group in the 4'-position of the biphenyl or, alternat... | 06/02/1987 |
| 4590301 | Polymerization inhibitors Compounds of the general formula ##STR1## wherein n, R1, R2 and X are defined herein, are effective inhibitors of polymerization of vinylic monomers, particularly acrylic monomers. The inhibitors are easily, efficiently, and tho... | 05/20/1986 |
| 4551562 | Process for the production of dihydroxybenzenes The nuclear hydroxylation of phenol with organic solutions of hydrogen peroxide in the presence of a catalyst is carried out in improved manner by employing both (1) a special, practically water free solution of hydrogen peroxide in an organic solvent whi... | 11/05/1985 |
| 4537996 | Hydroxybiphenyl compounds New hydroxybiphenyl compounds of the general formula: ##STR1## wherein R1 stands for a hydrogen atom or a hydroxyl group, R2 for a hydrogen atom or a hydroxyl group, R3 for a hydroxyl group, a group of the formula -CH... | 08/27/1985 |
| 4360469 | Preparation of quinones by salcomine-catalyzed oxidation of phenols It has been found that unexpectedly high yields of a high purity product can be obtained when substituted p-quinones are prepared by oxidation, using a molecular oxygen-containing gas, of the corresponding phenols in an inert solvent having a dipole momen... | 11/23/1982 |
| 4258268 | Polycyclic phenols, alcohols and ketones from phenols, cyclic alcohols and cyclic ketones using a nickel oxide/manganese oxide/magnesium oxide catalyst in presence of at least one of hydrogen and nitrogen At least one of a polycyclic phenol, a polycyclic alcohol and a polycyclic ketone is produced under hydrogenation conditions using a nickel oxide/manganese oxide/magnesium oxide catalyst by subjecting at least one of a monocyclic ketone, a monocyclic alco... | 03/24/1981 |
| 4219501 | Anti-inflammatory method Compounds in which 2,6-di(t-butyl)phenol is substituted in the 4 position by an optionally substituted phenyl group have valuable pharmacological activity as anti-inflammatory agents.... | 08/26/1980 |
| 4174460 | Process for the hydroxylation of phenols and phenol ethers in the nucleus A process for the hydroxylation of phenols and phenol ethers in the nucleus with hydrogen peroxide wherein a phenol or a phenol ether is reacted at the start of the reaction with substantially anhydrous hydrogen peroxide and wherein the reaction is carrie... | 11/13/1979 |
| 4157449 | Ethynylbenzene compounds and derivatives thereof Hydroxy, alkoxy and acyloxy ethynylbenzene compounds and their derivatives which are useful for the treatment for the relief of inflammation, pain and fever.... | 06/05/1979 |
| 4147726 | Acid-catalyzed hydrolysis of organic hydroperoxide employing a polar solvent and phenol as reaction medium An organic hydroperoxide is hydrolyzed by acid-catalysis in a reaction medium comprising essentially a mixture of a polar solvent, e.g. a low boiling, low molecular weight alcohol and/or sulfolane and phenol. Specifically cyclohexanone and phenol are obta... | 04/03/1979 |
| 4101591 | Ethynylbenzene compounds and derivatives thereof Haloloweralkyl ethynylbenzene compounds and their derivatives which are useful for the treatment for the relief of inflammation, pain and fever.... | 07/18/1978 |
| 4094912 | Process for converting aromatic aldehydes to phenolic compounds Aromatic aldehydes wherein the aldehyde group is directly attached to the aromatic ring are oxidized directly to phenolic compounds in the vapor phase. Tar and carbonaceous product formation are minimized by the method of preheating and mixing the reactan... | 06/13/1978 |
| 4092364 | Caustic hydrolysis of chlorobenzene to diphenyl oxide The process of preparing diphenyl oxide from caustically hydrolyzing chlorobenzene, wherein phenol is a by-product, is improved by recycling the phenol. The improvement not only maximizes the yield of diphenyl oxide while minimizing the yield of phenol, b... | 05/30/1978 |
| 4088702 | Process for preparing o-phenylphenol A process for preparing o-phenylphenol by dehydrogenating at least one of cyclohexanone dimer and o-cyclohexylphenol in the presence of a catalyst, characterized in that the catalyst is one prepared by causing a metal oxide carrier to support at least one... | 05/09/1978 |
| 4085150 | Process for the ortho alkylation of phenols in the presence of a copper-zinc-aluminum mixed oxide catalyst A process for selectively ortho-alkylating a phenolic compound which comprises reacting the phenolic compound with an alkanol in the presence of a copper-zinc-aluminum mixed oxide catalyst.... | 04/18/1978 |
| 4080390 | Process for the production of o-phenylphenol A process for the production of o-phenylphenol in the presence of a catal composed of a γ-alumina or silica-alumina support having a BET surface area of 150 - 300 m2 /g, a pore capacity of 0.50 - 0.85 ml/g and an iron content of at most 0.1 %... | 03/21/1978 |
