Patents by Inventor Leslie R. Rudnick
Leslie R. Rudnick has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6313075Abstract: Alkylated thianthrenes are high temperature stable lubricant fluids having excellent thermal stability, antiwear and load-carrying properties and excellent additive solubility as well as multifunctional additives for fuels.Type: GrantFiled: August 29, 1991Date of Patent: November 6, 2001Inventors: Leslie R. Rudnick, Carleton N. Rowe
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Patent number: 5780402Abstract: Novel alkylated thiophenols are high temperature stable lubricant fluids having low temperature properties and excellent load-carrying properties and additive solubility.Type: GrantFiled: August 22, 1991Date of Patent: July 14, 1998Inventor: Leslie R. Rudnick
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Patent number: 5773524Abstract: Epoxidized linear block, random, star-branched block or star-branched random polymers are disclosed which prior to epoxidation contain at least one conjugated diene having at least five carbon atoms of the formula (1) ##STR1## wherein R.sup.1 -R.sup.6 are each hydrogen or a hydrocarbyl group, provided that at least one of R.sup.1 -R.sup.6 is a hydrocarbyl group and the structure of the residual double bond in the polymerized diene of formula (1) has the formula (2) ##STR2## wherein R.sup.I, R.sup.II, R.sup.III and R.sup.IV are each hydrogen or a hydrocarbyl group, provided that either both R.sup.I and R.sup.II are hydrocarbyl groups or both R.sup.III and R.sup.IV are hydrocarbyl groups; and the remainder of the conjugated diene different from the diene of formula (1), has at least four carbon atoms of the formula (3) ##STR3## wherein R.sup.7 -R.sup.Type: GrantFiled: August 11, 1995Date of Patent: June 30, 1998Assignee: Mobil Oil CorporationInventors: Thomas S. Coolbaugh, Frederick C. Loveless, Demetreos N. Matthews, Leslie R. Rudnick
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Patent number: 5625100Abstract: There is disclosed a linear block copolymer comprising at least one triblock I--B--I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as 1,3-butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block.Type: GrantFiled: December 26, 1995Date of Patent: April 29, 1997Assignee: Mobil Oil CompanyInventors: Thomas S. Coolbaugh, Frederick C. Loveless, Demetreos N. Matthews, Leslie R. Rudnick
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Patent number: 5552071Abstract: Monoalkylated diphenyl oxides are high-temperature stable lubricant fluids having excellent low temperature viscometrics, and excellent additive solubility. These monoalkylated products are obtained by the alkylation of diphenyl oxide using, for example, an olefin alkylating agent, usually in the C.sub.8 to C.sub.18 range, in the presence of an acidic zeolite alkylation catalyst such as USY, which provides the selectivity for the monoalkylated product.Type: GrantFiled: September 23, 1994Date of Patent: September 3, 1996Assignee: Mobil Oil CorporationInventors: Leslie R. Rudnick, Ross A. Kremer, Derek A. Law
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Patent number: 5545783Abstract: There is disclosed a linear block copolymer comprising at least one triblock I-B-I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as 1,3-butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block.Type: GrantFiled: February 3, 1995Date of Patent: August 13, 1996Assignee: Mobil Oil CorporationInventors: Thomas S. Coolbaugh, Frederick C. Loveless, Demetreos N. Matthews, Leslie R. Rudnick
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Patent number: 5510548Abstract: There is disclosed a linear block copolymer comprising at least one triblock I-B-I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as 1,3-butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block.Type: GrantFiled: May 18, 1995Date of Patent: April 23, 1996Assignee: Mobil Oil CorporationInventors: Thomas S. Coolbaugh, Frederick C. Loveless, Demetreos N. Matthews, Leslie R. Rudnick
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Patent number: 5395538Abstract: Alkylated thiophene compounds are high temperature stable lubricant fluids having excellent thermal stability, antiwear and load-carrying properties and excellent additive solubility.Type: GrantFiled: January 28, 1994Date of Patent: March 7, 1995Assignee: Mobil Oil CorporationInventors: Leslie R. Rudnick, Carleton N. Rowe
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Patent number: 5387730Abstract: There is disclosed a linear block copolymer comprising at least one triblock I-B-I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block.Type: GrantFiled: January 7, 1994Date of Patent: February 7, 1995Assignee: Mobil Oil CorporationInventors: Thomas S. Coolbaugh, Frederick C. Loveless, Demetreos N. Matthews, Leslie R. Rudnick
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Patent number: 5372734Abstract: Alkylated benzothiophenes or dibenzothiophenes are high-temperature stable lubricant fluids having extreme pressure and antiwear properties, additive solubility and inherent EP/antiwear properties. These novel fluids may also be used as additives in other lubricant fluids.Type: GrantFiled: January 19, 1993Date of Patent: December 13, 1994Assignee: Mobil Oil CorporationInventors: Derek A. Law, Carleton N. Rowe, Leslie R. Rudnick
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Patent number: 5371248Abstract: Monoalkylated benzofuran adducts provide high temperature stable lubricant fluids having not only excellent thermal stability, but good low-temperature properties and excellent additive solubility as well.Type: GrantFiled: February 22, 1993Date of Patent: December 6, 1994Assignee: Mobil Oil CorporationInventor: Leslie R. Rudnick
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Patent number: 5338469Abstract: A combination of Mannich type reaction products of ethoxylated alkylated phenol, and alkylated arylamine possess excellent antioxidant properties. The presence of alkylated phenol in the structure is believed to provide a synergistic antioxidant activity with the aromatic amine. Presence of the alkylated aromatic moiety is believed to provide enhanced lubricant solubility compared to unalkylated diphenylamine type antioxidants. Application of these synergistic mixtures of additives and synthetic base stocks in premium automotive and industrial lubricants will significantly enhance stability and extend service life.Type: GrantFiled: December 7, 1992Date of Patent: August 16, 1994Assignee: Mobil Oil CorporationInventors: Lloyd A. Nelson, Leslie R. Rudnick
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Patent number: 5338470Abstract: Alkylated citric acid derivatives obtained as a reaction product of citric acid and an alkyl alcohol or an amine have been found to be effective antiwear and friction modifying additives for fuels and lubricants.Type: GrantFiled: December 10, 1992Date of Patent: August 16, 1994Assignee: Mobil Oil CorporationInventors: John Hiebert, Carleton N. Rowe, Leslie R. Rudnick
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Patent number: 5336420Abstract: An aromatic functional fluid, specifically a monoalkylated tetradecyl diphenyl oxide synthetic lubricant, contains a polymer-supported reaction product of an organic quaternary ammonium salt, derived from a mercapto-heterocycle and a quaternary ammonium salt. To produce the polymer-supported organic quaternary ammonium salt, the salt is reacted with a dicarboxylic acid or anhydride, specifically 2-dodecen-1-ylsuccinic anhydride. An arylamine antioxidant, such as alkylated phenyl naphthylamine, can be added to the polymer supported organic quaternary ammonium salt-treated functional fluid to impart extra antioxidant and stability properties.Type: GrantFiled: December 14, 1992Date of Patent: August 9, 1994Assignee: Mobil Oil CorporationInventors: Andrew G. Horodysky, Shih-Ying Hsu, Andrew Jeng, Leslie R. Rudnick
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Patent number: 5288937Abstract: Block and random straight chain and star-branched liquid copolymers of two different conjugated dienes, the residual ethylenic unsaturation of the polymerized units of one of which, e.g. isoprene, is less readily hydrogenated than that of the other diene, e.g., butadiene. In the case of block copolymers, the terminal blocks of a straight chain copolymer or the blocks of the free ends of the branches of a star-branched copolymer are composed of the less readily hydrogenated diene polymer while the more readily hydrogenated diene polymer is in the form of central blocks of a straight chain copolymer or interior blocks of the branches of a star-branched copolymer.Type: GrantFiled: December 17, 1992Date of Patent: February 22, 1994Assignee: Mobil Oil CorporationInventors: Thomas S. Coolbaugh, Frederick C. Loveless, Demetreos N. Matthews, Leslie R. Rudnick
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Patent number: 5286396Abstract: Monoalkylated phenoxathins are high-temperature stable lubricant fluids having extreme pressure and antiwear properties, additive solubility and inherent EP/antiwear properties. These novel phenoxathin fluids may also be used as additives in other lubricant fluids and are prepared by alkyating a phenoxathin in the presence of an acidic zeolite catalyst.Type: GrantFiled: June 8, 1992Date of Patent: February 15, 1994Assignee: Mobil Oil CorporationInventors: Leslie R. Rudnick, Carleton N. Rowe, Derek A. Law, G. Ali Naghipur
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Patent number: 5210359Abstract: There is disclosed a linear block copolymer comprising at least one triblock I-B-I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as 1,3-butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block.Type: GrantFiled: August 6, 1992Date of Patent: May 11, 1993Assignee: Mobil Oil CorporationInventors: Thomas S. Coolbaugh, Frederick C. Loveless, Demetreos N. Matthews, Leslie R. Rudnick
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Patent number: 5171908Abstract: The invention is directed to method of making a thermally and oxidatively stable lubricating oil having a high viscosity index and a low pour point by the thermal polymerization of 1-olefins containing 8 to 10 carbon atoms, the preferred 1-olefins are 1-decanes. The polymerization is conducted at temperatures ranging from 280.degree. C. to 350.degree. C. and low pressures, of less than about 280 psig, in a reactor which is free of catalytic material. Thereafter, the polyalphaolefin is hydrotreated over a nickel catalyst, preferably nickel on Kieselguhr. In an improved process the polyalphaolefin is separated from a low molecular weight product by distillation. The low molecular product contains unreacted 1-olefins which are recycled to the thermal polymerization zone to produce more of the lubricant base stock.Type: GrantFiled: November 18, 1991Date of Patent: December 15, 1992Assignee: Mobil Oil CorporationInventor: Leslie R. Rudnick
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Patent number: 5149895Abstract: There is disclosed a linear block copolymer comprising at least one triblock I-B-I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as 1,3-butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block.Type: GrantFiled: January 16, 1990Date of Patent: September 22, 1992Assignee: Mobil Oil CorporationInventors: Thomas S. Coolbaugh, Frederick C. Loveless, Demetreos N. Matthews, Leslie R. Rudnick
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Patent number: 4943383Abstract: Epoxy functionalized polyalpha-olefin lubricants compositions are prepared with superior properties by epoxidizing the olefinic bond of oligomers prepare by oligomerizing C.sub.6 -C.sub.20 alpha-olefins with reduced valence state chromium catalyst on silica support. The invention encompasses a product of reaction made by epoxidizing C.sub.30 + polyalpha-olefin oligomeric hydrocarbon lubricant having a branch ratio of less than 0.19 and pour point below -15.degree. C. in the presence of an epoxidizing amount of an epoxidizing agent wherein said product comprises a mixture of 2-dialkyl oxirane and 1,2-dialkyl oxirane having between an average of C.sub.30 and C.sub.1000 carbon atoms, said mixture having a branch ratio of less than 0.19 and pour point below -15.degree. C. The invention further encompasses blends and additive compositions of the novel epoxidizing polyalpha-olefins.Type: GrantFiled: June 23, 1988Date of Patent: July 24, 1990Assignee: Mobil Oil CorporationInventors: Noyes L. Avery, Andrew G. Horodysky, Derek A. Law, Leslie R. Rudnick