The Heavy Metal Is Zinc Patents (Class 508/371)
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Publication number: 20040242435Abstract: A machine tool is used for machining a workpiece in the presence of a cutting oil composition. The machine tool includes a tool base and a hard carbon coating formed on the tool base. The hard carbon coating has 1 atomic % or less of hydrogen. The cutting oil composition contains a base oil and at least one of an ashless fatty-ester friction modifier and an ashless aliphatic-amine friction modifier.Type: ApplicationFiled: May 28, 2004Publication date: December 2, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Kimio Nishimura, Yutaka Mabuchi, Tomohiro Kondo
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Publication number: 20040209786Abstract: A transmission oil composition for an automobile characterized in that it contains a base oil selected from the group consisting of a mineral oil, a synthetic oil and mixtures thereof; and a phosphate compound selected from the group consisting of (A) a zinc dithiophosphate having a hydrocarbon group, (B) a triaryl phosphate (C) a triaryl thiophosphate, and mixtures thereof at 0.1 to 15.0% by mass with respect to the total composition; wherein the composition has a volume resistivity of 1×107 ohm·m or more at 80° C.Type: ApplicationFiled: February 11, 2004Publication date: October 21, 2004Inventors: Takumaru Sagawa, Takafumi Ueno, Hisayuki Wada, Tooru Aoki
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Patent number: 6806242Abstract: A low-friction sliding mechanism of the present invention comprises first and second sliding members slidable relative to each other at sliding surfaces thereof and a lubricant being applied to the sliding surfaces of the first and second sliding members. The first and second members are made of a diamond-like carbon material and an iron-based material, respectively, and the lubricant comprises a base oil and at least one of an ashless fatty-ester friction modifier and an ashless aliphatic-amine friction modifier.Type: GrantFiled: January 31, 2003Date of Patent: October 19, 2004Assignees: Nissan Motor Co., Ltd., Nippon Oil CorporationInventors: Shinichi Shirahama, Shozaburo Konishi, Makoto Kano, Yoshiteru Yasuda, Tokio Sakane
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Publication number: 20040176260Abstract: Lubricating oil compositions for internal combustion engines comprises a mineral and/or synthetic base oil, (A) a succinimide-based ashless dispersant in an amount of 0.08 to 0.40 percent by mass in terms of nitrogen, (B) a metallic detergent in an amount of 0.06 to 0.22 percent by mass in terms of metal element, (C) a zinc secondary alkyldithiophosphate in an amount of 0.04 to 0.08 percent by mass in terms of phosphorus, and (D) a phosphorus-containing ashless anti-wear agent in an amount of 0.01 to 0.04 percent by mass in terms of phosphorus and contains sulfated ashes derived from the metal elements in the composition in an amount of 0.3 to 1.0 percent by mass. The lubricating oil compositions are excellent in anti-wear properties and high-temperature detergency although they are decreased in ash content.Type: ApplicationFiled: March 15, 2004Publication date: September 9, 2004Applicant: Nippon Oil CorporationInventors: Shinichi Shirahama, Yasuhisa Yamada, Isao Kurihara
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Patent number: 6777378Abstract: This invention relates to a lubricating oil composition, comprising: (A) a base oil; (B) a molybdenum and sulfur containing composition derived from a basic nitrogen containing compound, a molybdenum compound and carbon disulfide; (C) a boron-containing compound; and (D) optionally a phosphorus containing compound, provided the phosphorus content of the lubricating oil composition does not exceed about 0.10% by weight.Type: GrantFiled: February 15, 2002Date of Patent: August 17, 2004Assignee: The Lubrizol CorporationInventors: William D. Abraham, Jack C. Kelley, Jonathan S. Vilardo
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Patent number: 6774091Abstract: A lubricant additive formulation for increasing the performance of conventional engine lubricants for use as an engine treatment oil additive formulated for addition to conventional motor oil to improve the lubricating properties of the engine oil and enhance the performance of the engine. A preferred embodiment of the engine treatment oil additive comprises a blend of chemical constituents including a base stock selected from a synthetic base stock, a mineral oil base stock, and a severely hydrocracked base stock or combinations thereof, an oil soluble molybdenum additive, dispersant inhibitor, and selected additives such as polytetrafluoroethylene, viscosity index improvers, and extreme pressure wear agent used in combination with a conventional crankcase lubricant at about a 20 to about a 25% volume/percent or as a complete motor oil. Additional components may be added to the engine treatment oil additive formulation to enhance specific properties for special applications.Type: GrantFiled: July 26, 2002Date of Patent: August 10, 2004Assignee: Ashland Inc.Inventors: Michael A. Dituro, Richard J. Baumgart, Frances E. Lockwood
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Patent number: 6774092Abstract: Disclosed is an additive composition that can be mixed with various types of basic oils to produce a lubricant that can meet the international standards of manual truck gearbox oils. A preferred embodiment includes various quantities of an isobutylene sulfide, zinc dialklydithiophosate and other components. Component properties of the additive composition are selected to produce a lubricant that has good thermal stability, rust-resisting and endurance qualities and that has a low cost of use and production.Type: GrantFiled: August 16, 2002Date of Patent: August 10, 2004Assignee: PetroChina Company, Ltd.Inventors: Xisheng Fu, Xiuling Hua
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Publication number: 20040147415Abstract: A lubricant composition comprising a major amount of an oil of lubricating viscosity and a minor amount of:Type: ApplicationFiled: September 30, 2003Publication date: July 29, 2004Inventors: Alisdair J. Brown, Roger W. Glyde, Rebecca Castle, Jane Gilmore, Simon S. M. Chung, Rolfe J. Hartley
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Patent number: 6767871Abstract: The lubricating oil of the present invention has a viscosity suitable for use in a diesel engine and includes at least one functionalized olefin polymer, and at least one zinc dialkyl dithiophosphate (ZDDP). The ZDDP is made from a mixture of primary alcohols or a mixture of primary and secondary alcohols, wherein the lubricant has a high boundary film value greater than or equal to 15, and preferably greater than 60, as measured by using a High Frequency Reciprocating Rig (HFRR).Type: GrantFiled: August 21, 2002Date of Patent: July 27, 2004Assignee: Ethyl CorporationInventors: Mark Thomas Devlin, Charles A. Passut, Carl K. Esche, Jr., John T. Loper
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Patent number: 6764982Abstract: This invention relates to a lubricating oil composition, comprising: (A) a base oil; and a phosphorus-containing compound represented by the formulae wherein in Formulae (B-I) and (B-II), R1, R2 and R3 are independently hydrogen or hydrocarbyl groups, and a, b and c are independently zero or 1; the lubricating oil composition being characterized by a sulfur content of about 0.01 to about 0.25% by weight.Type: GrantFiled: January 31, 2002Date of Patent: July 20, 2004Assignee: The Lubrizol CorporationInventors: Ewa A. Bardasz, Virginia A. Carrick, William D. Abraham, Gordon D. Lamb
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Publication number: 20040138073Abstract: An additive for imparting antiwear properties to a lubricant composition is based on a combination of (1) an organo borate ester composition and (2) one or more sulfur- or phosphorus-containing compounds or a non-sulfur molybdenum compound. The sulfur- or phosphorus-containing compounds are dithiocarbamate, bisdithiocarbamate, 1,3,4-diathiazole, phosphorodithioate, phosphorodithioate esters, and the molybdenum compound is prepared by reacting (a) about 1.0 mole of fatty oil having 12 or more carbon atoms, (b) about 1.0 to 2.5 moles diethanolamine and (c) a molybdenum source.Type: ApplicationFiled: October 2, 2003Publication date: July 15, 2004Applicant: R.T. Vanderbilt Company, Inc.Inventors: Thomas J. Karol, Steven G. Donnelly
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Publication number: 20040116309Abstract: An oil composition for cutting and grinding by minimal quantity lubrication system and for sliding surface according to the present invention comprises an ester and a sulfur compound and/or a phosphorus compound.Type: ApplicationFiled: October 3, 2003Publication date: June 17, 2004Inventors: Hideo Yokota, Masanori Ibi, Satoshi Suda
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Publication number: 20040106527Abstract: This invention relates to a lubricating oil composition used in conjunction with a gasoline fuel having a sulphur content of less than 10 ppm by weight, characterised in that said oil composition has a phosphorus content of no more than 0.05% by weight. The feature of the invention is that the use of a low sulphur fuel enables the amount of anti-wear agents containing phosphorus such as eg ZDDP to be halved without any adverse effect on the anti-wear performance of the lubricating oil.Type: ApplicationFiled: July 25, 2003Publication date: June 3, 2004Inventors: Stuart Pace, Medi Mostafa Hafez, Maria-Laura Kosidowski, Robert Barbour, Alan Mark Schilowitz
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Publication number: 20040087452Abstract: Lubricating oil compositions containing a major amount of oil of lubricating viscosity, an oil soluble molybdenum compound in an amount providing the composition with from 0.001 to 0.1 mass % molybdenum, an oil soluble copper antioxidant in an amount providing the composition with from 0.001 to 0.02 mass % copper to said composition, and an amount of metal hydrocarbyl dithiophosphate providing the composition with from 100 to 550 ppm phosphorus.Type: ApplicationFiled: October 31, 2002Publication date: May 6, 2004Inventors: Joe R. Noles, Wangkan Lin, Rolfe J. Hartley
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Publication number: 20040087450Abstract: Disclosed are methods and lubricant compositions for reducing wear in internal combustion engines lubricated with a low phosphorous content lubricating oil. The lubricant compositions of this invention comprise a synergistic combination of a dispersed, hydrated, alkali metal borate and at least one phosphorous-containing compound wherein the total phosphorous employed in the composition is no more than about 0.08 weight percent based on the total weight of the composition.Type: ApplicationFiled: October 31, 2002Publication date: May 6, 2004Inventor: Alexander B. Boffa
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Patent number: 6730638Abstract: A lubricating composition for internal combustion engines especially useful with fuels having less than 350 ppm sulfur comprises a lubricating oil basestock, a boron containing ashless dispersant, a molybdenum containing friction reducing agent, a metal type detergent and zinc dithiophosphate.Type: GrantFiled: January 24, 2003Date of Patent: May 4, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Liehpao O. Farng, Andrew Jackson, Willie A. Givens, Jr., Douglas E. Deckman, William H. Buck
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Patent number: 6730640Abstract: Continuously variable transmissions are lubricated by supplying to the transmission a composition of an oil of lubricating viscosity and an oil-soluble zinc salt containing at least one hydrocarbyl group of at least 4 carbon atoms. The amount of the zinc salt is sufficient to provide an increased steel-on-steel dynamic coefficient of friction for the composition, being at least 0.125. The composition is substantially free from thiophosphate salts and exhibits a copper corrosion rating of 1B or better (ASTM-130).Type: GrantFiled: June 10, 2002Date of Patent: May 4, 2004Assignee: The Lubrizol CorporationInventors: Roger L. Sowerby, Craig D. Tipton, James L. Sumiejski
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Patent number: 6723685Abstract: A lubricating oil composition comprising a) an oil of lubricating viscosity having a viscosity index of at least 95; b) at least one calcium detergent; c) at least one oil soluble molybdenum compound; d) at least one organic ashless nitrogen-free friction modifier; and e) at least one metal dihydrocarbyldithiophosphate compound, the composition having a Noack volatility of about 15 wt. % or less, from 0.05 to 0.6 wt. % calcium from the calcium detergent, molybdenum in an amount of at least 10 ppm from the molybdenum compound, and phosphorus from the metal dihydrocarbyldithiophosphate compound in an amount up to about 0.1 wt. %.Type: GrantFiled: April 5, 2002Date of Patent: April 20, 2004Assignee: Infineum International Ltd.Inventors: Rolfe J. Hartley, Malcolm Waddoups
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Patent number: 6720293Abstract: A low viscosity lubricating oil composition having a CCS viscosity less than 3500 mPa.s at −25° C. and having no more than 0.16 mass % of phosphorus which comprises a dispersant, and a detergent of calcium or magnesium or both; and optionally a zinc dihydrocarbyldithiophosphate, a viscosity modifier, a pour point depressant and an antioxidant. The oil satisfies the Cummins M11 cross-head wear engine test specification in a low phosphorus and low viscosity formulation.Type: GrantFiled: September 24, 2001Date of Patent: April 13, 2004Assignee: Infineum International Ltd.Inventors: Charles H. Bovington, Christopher J. Locke, Terence Kelly
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Patent number: 6706671Abstract: Disclosed herein is a composition comprising: (A) a lubricant, and (B) at least one alkyl succinhydrazide compound of the formula: wherein: R1 is selected from the group consisting of linear or branched alkyl, alkenyl, alkaryl, alkyl ether, alkyl ester, and alkylene ester groups; R2 is selected from the group consisting of hydrogen, linear or branched alkyl, alkenyl, alkyl ether, and alkyl ester groups; and R3 and R4 are independently selected from the group consisting of hydrogen, linear or branched alkyl and alkenyl groups, aryl groups, and alkaryl groups.Type: GrantFiled: November 30, 2001Date of Patent: March 16, 2004Assignee: Uniroyal Chemical Company, Inc.Inventor: Theodore E. Nalesnik
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Publication number: 20040038836Abstract: The lubricating oil of the present invention has a viscosity suitable for use in a diesel engine and includes at least one functionalized olefin polymer, and at least one zinc dialkyl dithiophosphate (ZDDP). The ZDDP is made from a mixture of primary alcohols or a mixture of primary and secondary alcohols, wherein the lubricant has a high boundary film value greater than or equal to 15, and preferably greater than 60, as measured by using a High Frequency Reciprocating Rig (HFRR).Type: ApplicationFiled: August 21, 2002Publication date: February 26, 2004Inventors: Mark Thomas Devlin, Charles A. Passut, Carl K. Esche, John T. Loper
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Patent number: 6689723Abstract: This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity, at least one organic polysulfide comprising less than about 88% dihydrocarbyl trisulfide, from up to about 5% dihydrocarbyl disulfide, and more than about 7 wt. % dihydrocarbyl higher polysulfides, and at least one phosphorus or boron compound, or mixtures of two or more thereof. The invention also relates to concentrates and greases containing the above combination. The invention also relates to methods of making the organic polysulfide.Type: GrantFiled: March 5, 2002Date of Patent: February 10, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: William T. Sullivan, Percy Rohinton Kanga, Thomas Smith Coolbaugh
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Publication number: 20040023819Abstract: Disclosed are methods and lubricant compositions for reducing wear in internal combustion engines lubricated with a low phosphorus content lubricating oil. The lubricant compositions of this invention comprise a synergistic combination of a complex of a molybdenum/nitrogen containing compound and at least one phosphorus-containing compound wherein the total phosphorus employed in the composition is no more than about 0.06 weight percent based on the total weight of the composition.Type: ApplicationFiled: August 1, 2002Publication date: February 5, 2004Inventor: Alexander B. Boffa
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Patent number: 6656887Abstract: Lubricating oil compositions comprise a lubricating base oil and (A) at least one compound selected from the group consisting of compounds represented by formula (1) below and compounds represented by formula (2) below: wherein R2, R1, R3 and R4 are each independently hydrogen or a hydrocarbon group having 1 to 30 carbon atoms, X1, X2, X3 and X4 are each independently oxygen or sulfur, but at least one of them is oxygen, and Y1 is a metal atom; and wherein R11 and R12 are each independently hydrogen or a hydrocarbon group having 1 to 30 carbon atoms, X11 and X12are each independently oxygen or sulfur, but at least one of them is oxygen, U is a monovalent metal ion, an ammonium ion or a proton, and k1 is an integer of 1 to 20. Lubricating oil compositions have excellent anti-wear properties and base number maintaining properties.Type: GrantFiled: January 23, 2002Date of Patent: December 2, 2003Assignee: Nippon Mitsubishi Oil CorporationInventors: Kazuhiro Yagishita, Jinichi Igarashi, Takeo Koizumi
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Publication number: 20030216266Abstract: A lubricating oil composition employable in combination with a low sulfur content fuel oil is preferably composed of a base oil having a sulfur content of at most 0.2 wt. %, an ashless dispersant comprising an alkenyl- or alkyl-succinimide or a derivative thereof, a metal-containing detergent containing an organic acid metal salt, a zinc dialkyldithiophosphate, a zinc dialkylaryldithiophosphate, and an oxidation inhibitor selected from the group consisting of a phenol compound, an amine compound, and a molybdenum-containing compound, wherein a ratio of the phosphorus content of the zinc dialkyldithiophosphate to the phosphorus content of the zinc dialkylaryldithiophosphate is in the range of 20:1 to 2:1.Type: ApplicationFiled: May 6, 2003Publication date: November 20, 2003Inventors: Satoshi Hirano, Shigeru Iwamoto, Morikuni Nakazato
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Patent number: 6642187Abstract: This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity, (A) at least one organic polysulfide comprising at least about 90% dihydrocarbyl trisulfide, from about 0.1% up to about 8% dihydrocarbyl disulfide, and less than about 5% dihydrocarbyl higher polysulfides, and (B) at least one overbased metal composition, at least one phosphorus or boron compound, or mixtures of two or more thereof. The invention also relates to concentrates and greases containing the above combination. The invention also relates to methods of making the organic polysulfide.Type: GrantFiled: December 24, 1996Date of Patent: November 4, 2003Assignee: The Lubrizol CorporationInventors: James J. Schwind, Ross L. Beebe
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Publication number: 20030199399Abstract: A lubricating oil composition comprising a) an oil of lubricating viscosity having a viscosity index of at least 95; b) at least one calcium detergent; c) at least one oil soluble molybdenum compound; d) at least one organic ashless nitrogen-free friction modifier; and e) at least one metal dihydrocarbyldithiophosphate compound, the composition having a Noack volatility of about 15 wt. % or less, from 0.05 to 0.6 wt. % calcium from the calcium detergent, molybdenum in an amount of at least 10 ppm from the molybdenum compound, and phosphorus from the metal dihydrocarbyldithiophosphate compound in an amount up to about 0.1 wt. %.Type: ApplicationFiled: April 5, 2002Publication date: October 23, 2003Inventors: Rolfe J. Hartley, Malcolm Waddoups
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Publication number: 20030176297Abstract: A lubricating oil composition having less than 0.2 wt. % sulfur, less than 50 ppm chlorine, less than 50 ppm phosphorus, a NOACK volatility of 15 wt. % or less comprising an organo-molybdenum compound, an overbased calcium or magnesium salicylate, a dispersant and a supplemental antioxidant.Type: ApplicationFiled: February 20, 2002Publication date: September 18, 2003Inventors: Rolfe J. Hartley, Malcolm Waddoups, Ricardo A. Bloch, Roger W. Glyde, Robert Robson
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Publication number: 20030162674Abstract: A heavy duty diesel engine lubricating oil composition comprising, or made by admixing:Type: ApplicationFiled: January 27, 2003Publication date: August 28, 2003Inventor: Robin Scott
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Publication number: 20030162672Abstract: A low-friction sliding mechanism of the present invention comprises first and second sliding members slidable relative to each other at sliding surfaces thereof and a lubricant being applied to the sliding surfaces of the first and second sliding members. The first and second members are made of a diamond-like carbon material and an iron-based material, respectively, and the lubricant comprises a base oil and at least one of an ashless fatty-ester friction modifier and an ashless aliphatic-amine friction modifier.Type: ApplicationFiled: January 31, 2003Publication date: August 28, 2003Applicant: NISSAN MOTOR CO., LTD.Inventors: Shinichi Shirahama, Shozaburo Konishi, Makoto Kano, Yoshiteru Yasuda, Tokio Sakane
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Patent number: 6610636Abstract: A premium synthetic lubricant having antiwear properties comprises a synthetic isoparaffinic hydrocarbon base stock and an effective amount of at least one antiwear additive. The antiwear additive is preferably at least one of a metal phosphate, a metal dialkyldithiophosphate, a metal dithiophosphate a metal thiocarbamate, a metal dithiocarbamate, an ethoxylated amine dialkyldithiophosphate and an ethoxylated amine dithiobenzoate. Metal dialkyldithiophosphates are preferred, particularly zincdialkyldithiophosphate (ZDDP). The base stock is derived from a waxy, Fischer-Tropsch synthesized hydrocarbon feed fraction comprising hydrocarbons having an initial boiling point in the range of about 650-750° F., by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The lubricant may also contain hydrocarbonaceous and synthetic base stock material in admixture with the Fischer-Tropsch derived base stock.Type: GrantFiled: November 9, 2001Date of Patent: August 26, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
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Publication number: 20030158048Abstract: A lubricating composition for internal combustion engines especially useful with fuels having less than 350 ppm sulfur comprises a lubricating oil basestock, a boron containing ashless dispersant, a molybdenum containing friction reducing agent, a metal type detergent and zinc dithiophosphate.Type: ApplicationFiled: January 24, 2003Publication date: August 21, 2003Inventors: Liehpao O. Farng, Andrew Jackson, Willie A. Givens, Douglas E. Deckman, William H. Buck
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Patent number: 6605571Abstract: Concentrates for lubricating oil compositions are prepared by blending at elevated temperature: (A) at least one high molecular weight ashless dispersant; and (B) at least one oil-soluble metal detergent; in the presence of (C) at least one metal salt of a dihydrocarbylphosphorodithoic acid wherein the metal of the metal salt is an alkali metal, an alkaline earth metal, or zinc, aluminium, lead, tin, molybdenum, manganese, nickel or copper.Type: GrantFiled: April 2, 1999Date of Patent: August 12, 2003Assignee: Exxon Chemical Patents Inc.Inventors: Gary Higton, Roger Glyde, Robert A. Wilkinson
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Publication number: 20030104953Abstract: Disclosed herein is a composition comprising:Type: ApplicationFiled: November 30, 2001Publication date: June 5, 2003Applicant: UNIROYAL CHEMICAL COMPANY, INC.Inventor: Theodore E. Nalesnik
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Patent number: 6541430Abstract: Fluorinated dialkyl dithiophosphoric acids according to formula (I) and metallic salts thereof: the compounds are useful, for example, as additives for lubricant compositions.Type: GrantFiled: March 24, 2000Date of Patent: April 1, 2003Assignee: E. I. du Pont de Nemours and CompanyInventor: Richard P. Beatty
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Publication number: 20030045436Abstract: Disclosed is an additive composition that can be mixed with various types of basic oils to produce a lubricant that can meet the international standards of manual truck gearbox oils. A preferred embodiment includes various quantities of an isobutylene sulfide, zinc dialklydithiophosate and other components. Component properties of the additive composition are selected to produce a lubricant that has good thermal stability, rust-resisting and endurance qualities and that has a low cost of use and production.Type: ApplicationFiled: August 16, 2002Publication date: March 6, 2003Inventors: Xisheng Fu, Xiuling Hua
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Publication number: 20030040442Abstract: The invention aims to provide a rolling bearing that secures a sufficient bearing life economically even when used under such conditions that water from the outside or water formed by moisture condensation may seep into the lubricant or the bearing is affected by the vibrations, and particularly a rolling bearing suited to the electric parts and accessaries of au automobile engine, such as an alternator. To accomplish the object, the hydrogen ion exponent pH of the grease sealed into the inside of the bearing is adjusted in a range of from 7 to 13. For the same purpose, the hydrogen ion exponent pH of the grease is adjusted in a range of from 5 to 13 where a prescribed amount of an organic metal salt or ADTC is added to the grease, where a prescribed amount of an inorganic compound having an average particle size of 2 □m or smaller is added to the grease, or where a diurea compound containing an aromatic amine or a mixture of the diurea compound is added to the grease as a thickener.Type: ApplicationFiled: March 7, 2002Publication date: February 27, 2003Applicant: NSK LTD.Inventors: Atsushi Yokouchi, Youichi Matsumoto, Kenichi Iso, Kouichi Hachiya, Hideki Koizumi, Michiharu Naka
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Patent number: 6521570Abstract: An automotive lubricant comprising a white oil basestock and one or more additives, at least one additive being an antioxidant. The white oil basestock may be blended with mineral oil and/or synthetic oil basestocks. The lubricant can be used, for example, as an engine oil, gear oil or automatic transmission fluid.Type: GrantFiled: January 26, 2000Date of Patent: February 18, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Marcel Alphonse Ostyn, Dominique Alves, Alain Gabriel Bouffet, Edgar Andreas Steigerwald
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Publication number: 20030013620Abstract: A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and an additive system comprising (A) from about 0.1 to about 5 % by weight of a detergent composition comprising at least two metal overbased compositions wherein said detergent composition consists essentially of (A-1) at least one alkali metal overbased detergent and (A-2) at least one calcium overbased detergent, wherein the ratio of total base number on a per 100 TBN and diluent-free basis contributed by the alkali metal detergent to the total base number contributed by the calcium detergent ranges from about 99.5-20 to about 0.5-80; (B) from about 1 to about 10 % by weight of a succinimide dispersant; and (C) from about 0.1 to about 5 % by weight of a metal dihydrocarbyl dithiophosphate of the formula (I) wherein R1 and R2 are each, independently, hydrocarbyl groups containing from 3 to 13 carbon atoms, M is a metal and n is an integer equal to the valence of M.Type: ApplicationFiled: May 23, 2002Publication date: January 16, 2003Inventor: Melody A. Wilk
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Publication number: 20030008783Abstract: An automotive lubricant comprising a white oil basestock and one or more additives, at least one additive being an antioxidant. The white oil basestock may be blended with mineral oil and/or synthetic oil basestocks. The lubricant can be used, for example, as an engine oil, gear oil or automatic transmission fluid.Type: ApplicationFiled: January 26, 2000Publication date: January 9, 2003Inventors: Marcel Alphonse Ostyn, Dominique Alves, Alain Gabriel Bouffet, Edgar Andreas Steigerwald
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Patent number: 6500786Abstract: Lubricating oil compositions exhibititing improved low temperature valve train wear performance with a lowered phosphorus content, which contain a reduced amount of a metal hydrocarbyl dithiophosphate, a molybdenum compound, a metal-free friction modifier and a phosphorus-free antioxidant.Type: GrantFiled: November 26, 2001Date of Patent: December 31, 2002Assignee: Infineum International Ltd.Inventors: Rolfe J. Hartley, Malcolm Waddoups
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Publication number: 20020183210Abstract: Continuously variable transmissions are lubricated by supplying to the transmission a composition of an oil of lubricating viscosity and an oil-soluble zinc salt containing at least one hydrocarbyl group of at least 4 carbon atoms. The amount of the zinc salt is sufficient to provide an increased steel-on-steel dynamic coefficient of friction for the composition, being at least 0.125. The composition is substantially free from thiophosphate salts and exhibits a copper corrosion rating of 1B or better (ASTM-130).Type: ApplicationFiled: June 10, 2002Publication date: December 5, 2002Inventors: Roger L. Sowerby, Craig D. Tipton, James L. Sumiejski
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Patent number: 6482777Abstract: This invention relates to a lubricating composition comprising a blend of a major amount of an oil of lubricating viscosity, gear or transmission oil package and a top treatment which comprises at least one saturated fatty phosphate ester or salt, wherein the lubricating composition is free of saturated fatty phosphites. Tin another embodiment, the invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity, at least one saturated fatty phosphate ester or salt, at least one polysulfide and at least one phosphorus antiwear or extreme pressure agent, wherein the lubricating composition is free of saturated fatty phosphites. The invention relates to additive combinations which when added to a lubricant can provide and improve frictional and, optionally, thermal stability properties. The additives include a phosphate ester or salt wherein the hydrocarbyl group of the phosphate is a fatty-saturated group.Type: GrantFiled: October 19, 1999Date of Patent: November 19, 2002Assignee: The Lubrizol CorporationInventor: Robert W. Cain
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Publication number: 20020151442Abstract: This invention relates to a lubricating oil composition, comprising: (A) a base oil; and a phosphorus-containing compound represented by the formulae 1Type: ApplicationFiled: January 31, 2002Publication date: October 17, 2002Applicant: The Lubrizol CorporationInventors: Ewa A. Bardasz, Virginia A. Carrick, William D. Abraham, Gordon D. Lamb
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Publication number: 20020142922Abstract: Lubricating oil compositions comprise a lubricating base oil and (A) at least one compound selected from the group consisting of compounds represented by formula (1) below and compounds represented by formula (2) below: 1Type: ApplicationFiled: January 23, 2002Publication date: October 3, 2002Applicant: Nippon Mitsubishi Oil CorporationInventors: Kazuhiro Yagishita, Jinichi Igarashi, Takeo Koizumi
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Publication number: 20020137639Abstract: Disclosed is a grease sealed bearing for automobile that has the high temperature resistance as well as shear stability, and prevents the noise at low temperature as well as the brittle flaking under high speed rotation and high load. The grease comprises a base oil containing a synthesized hydrocarbon oil and one or more ester oils at a weight ratio of 0.1 to 0.49:0.9 to 0.51; 5 to 30% by weight of a urea based thickener, and 0.1 to 10% by weight of dithiozinc phosphate based on the whole grease. The grease sealed bearing for automobile is obtained by sealing a bearing used in a device driven by an automobile engine with the grease.Type: ApplicationFiled: January 16, 2002Publication date: September 26, 2002Inventors: Mitsunari Asao, Hidenobu Mikami, Takayuki Kawamura, Takahiro Koremoto, Kunio Takemura
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Publication number: 20020119896Abstract: Lubricant compositions comprise a lubricant base oil, and (A) a mono substituted amide type bissuccinimide in an amount from 0.5 to 20 percent by mass, (B) zinc dithiophosphate in an amount from 0.05 to 0.3 percent by mass of phosphorus, and (C) a metal-based detergent in an amount form 0.5 to 4.0 percent by mass of sulfated ash, based on the total mass of the composition. Lubricant compositions preferably further comprises (D) a dispersant type viscosity index improver in an amount from 0.1 to 20 percent by mass, based on the total mass of the composition.Type: ApplicationFiled: September 27, 2001Publication date: August 29, 2002Applicant: NIPPON MITSUBISHI OIL CORPORATIONInventors: Kazuhiro Yagishita, Jinichi Igarashi, Osamu Kurosawa
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Publication number: 20020107152Abstract: A low-phosphorus lubricant comprises:Type: ApplicationFiled: December 5, 2001Publication date: August 8, 2002Inventor: Robert Robson
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Patent number: 6426323Abstract: To provide a lubricating oil composition for continuously variable transmission which ensures both a high coefficient of friction between metals required for a push belt-type CTV oil and an excellent wear preventing property relative to a belt and a pulley. A lubricating oil composition for continuously variable transmission is provided, which comprises a lubricating base oil made of a mineral oil and/or a synthetic oil formulated with a metal detergent and a phosphorus-based wear preventive characterized in that a ratio between a content (ppm) of a metal derived from said metal detergent and based on the total weight of the lubricating oil composition and a total base number (mg KOH/g) ranges 0.75-4.5 (ppm/mg KOH/g), and a ratio between the content (ppm) of the metal derived from said metal detergent and a content of phosphorus derived from said phosphorus-based wear preventive ranges 0.5-2.0 (ppm/ppm).Type: GrantFiled: June 5, 2001Date of Patent: July 30, 2002Assignee: TonenGeneral Sekiyu K.K.Inventors: Takehisa Sato, Takanori Kugimiya
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Publication number: 20020086802Abstract: This invention relates to a lubricating composition comprising a blend of a major amount of an oil of lubricating viscosity, gear or transmission oil package and a top treatment which comprises at least one saturated fatty phosphate ester or salt, wherein the lubricating composition is free of saturated fatty phosphites. Tin another embodiment, the invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity, at least one saturated fatty phosphate ester or salt, at least one polysulfide and at least one phosphorus antiwear or extreme pressure agent, wherein the lubricating composition is free of saturated fatty phosphites. The invention relates to additive combinations which when added to a lubricant can provide and improve frictional and, optionally, thermal stability properties. The additives include a phosphate ester or salt wherein the hydrocarbyl group of the phosphate is a fatty-saturated group.Type: ApplicationFiled: October 19, 1999Publication date: July 4, 2002Inventor: ROBERT W. CAIN