Patents Examined by Jacqueline V. Howard
  • Patent number: 6696391
    Abstract: A wiper blade rubber having a coating film on both surfaces of the lip part, the coating film comprising a particulate solid lubricant and a binder and the binder having a 0.5% modulus of 1 MPa or more and an elongation to break of 1% or more.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: February 24, 2004
    Assignees: Denso Corporation, ASMO Co. Ltd.
    Inventors: Shinya Goto, Naoki Torii, Hiroaki Ohsako, Kouitsu Itoh
  • Patent number: 6696393
    Abstract: 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: Grant
    Filed: August 1, 2002
    Date of Patent: February 24, 2004
    Assignee: Chevron Oronite Company LLC
    Inventor: Alexander B. Boffa
  • Patent number: 6689725
    Abstract: This invention relates to a method of controlling the soot induced viscosity increase of a diesel engine lubricant composition comprising a base oil and a dispersant, by including in said lubricant composition an effective amount of an antioxidant, characterised in that the antioxidant comprises a dihydrocarbyldithiocarbamate of a metal selected from antimony, bismuth and mixtures thereof. The antioxidant may optionally contain at least one other compound selected from a phenolic and an aminic compound. The method of the present invention improves the performance retention of the dispersant additive, and thus inhibits the soot-induced viscosity increase of the lubricant.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: February 10, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: Jason Zhisheng Gao
  • Patent number: 6689721
    Abstract: This invention is to provide a conductive grease which is less to decrease conductivity as a time passes. The conductive grease comprises a base oil, a thickener, a conductive solid powder, and at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent, wherein an amount of the conductive solid powder added is 0.1 to 10 wt %, and an amount of the at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent added is 0.1 to 10 wt %. Further, the conductive grease comprises the base oil and at least one of conductive additives, and the conductive additives are fibrous carbon, metallic particle, metallic compound particle and carbon nano-tube. The conductive grease to be packed into the rolling bearing comprises conductive fine particles such as carbon black and has an oil separation degree of 2% or lower.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: February 10, 2004
    Assignee: NSK Ltd.
    Inventors: Katsuaki Denpo, Atsushi Yokouchi, Koichi Hachiya, Michiharu Naka, Tooru Shouda, Hideki Koizumi
  • Patent number: 6689722
    Abstract: An environmentally safe lubricating composition comprising a suspension of submicron molybdenum disulfide in canola oil is disclosed. Preferably the canola oil comprises trimethylol propane trioleate ester. In combining the molybdenum disulfide with the canola oil it preferred that the high shear mixing occur in the presence of a magnetic field.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: February 10, 2004
    Assignee: Pantera, Inc.
    Inventors: David Peter Holst-Grubbe, Maurice Leroy Oyanadel
  • Patent number: 6676827
    Abstract: A method for producing a lube basestock from a waxy feed is disclosed in which a feed containing to 50 wt % or more of wax is hydrotreated and stripped to lower the nitrogen and sulfur content of the feed. The feed is then hydroisomerized under conditions to 370° C. hydrocatalytically dewaxed with a catalyst comprising a mixture of a catalytically active metal on a zeolite dewaxing catalyst and an amorphous catalyst, or alternatively is solvent dewaxed and then hydrocatalytically dewaxed with the just described catalyst.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: January 13, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: William John Murphy, Ian Alfred Cody, Bernard George Silbernagel
  • Patent number: 6677282
    Abstract: Hydrocarbyl substituted carboxylic compositions and derivatives thereof useful as dispersant/viscosity improvers for lubricating oil and fuel compositions. Carboxylic compositions are derived from (A) a hydrocarbon polymer having Mn ranging from about 20,000 to about 500,000, and (B) an &agr;,&bgr;-unsaturated carboxylic compound prepared by reacting (1) an active methylene compound of the formula (I), and (2) a carbonyl compound of the general formula (II), wherein Ra is H or hydrocarbyl and Rb is a member of the group consisting of H, hydrocarbyl and (III), wherein each R′ is independently R or OR and each R is, independently, H or a hydrocarbyl group; and lower alkyl acetals, ketals, hemiacetals and hemiketals of the carbonyl compound (2).
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: January 13, 2004
    Assignee: The Lubrizol Corporation
    Inventors: Richard M. Lange, Stuart L. Bartley, Daniel M. Vargo
  • Patent number: 6677279
    Abstract: The invention relates to a variety of uses for novel carbon monoxide containing polymers. More specifically, the invention employs the use of low molecular weight polymers containing carbon monoxide for use as adhesive additives and as fluids (e.g., solvents and synthetic base stocks).
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: January 13, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Abhimanyu Onkar Patil, Donald Norman Schulz, Michael Gerard Matturro, Richard Henry Schlosberg
  • Patent number: 6677284
    Abstract: A problem with refrigeration systems using ammonia as the refrigerant and hydrocarbon lubricants is that the seals/gaskets of the systems have a tendency to harden and shrink. This can cause leakage of the refrigerant and eventually require disassembly of the equipment and replacement of the seals. The addition of a small amount polyether having an aromatic fragment of 6-18 carbon atoms or an aliphatic fragment of 10-22 carbon atoms can soften the seals and partially re-swell the seals solving the leakage problem and avoiding expensive maintenance costs. Alternatively a polyether of 1,2-butylene oxide which is more oil soluble than most other polyethers with a smaller Z group e.g. derived from alkanols of 1 to 9 carbon would be effective at reducing hardening and shrinkage.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: January 13, 2004
    Assignee: The Lubrizol Corporation
    Inventors: Thomas Rajewski, John C. Tolfa, Hsinheng Li
  • Patent number: 6677283
    Abstract: Disclosed is a bearing assembly that includes a bearing insert that engages a bearing housing at an interface. In accordance with the invention, the interface is lubricated with a lubricant that provides sufficient lubrication such that the breaking housing torque required to initiate relative movement of the outer portion and housing is no greater than 130% of the moving housing torque required to maintain relative movement of the outer portion and housing. The lubricant preferably is a fatty acid, such as stearic acid or palmitic acid. In accordance with highly preferred embodiments of the invention, the lubricant comprises a grease composed of a base lubricating oil that is thickened with a fatty acid that is substantially uniformly dispersed therein.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: January 13, 2004
    Assignee: Emerson Power Transmission Manufacturing, L.P.
    Inventor: Ben Ni
  • Patent number: 6677281
    Abstract: A lubricant having improved rust protection and demulsibility has a specific balance of an ashless dispersant and a rust inhibitor additive combination comprising a metallic and ashless rust inhibitor.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: January 13, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Willie Allan Givens, Jr., Angela Stefana Galiano-Roth
  • Patent number: 6673751
    Abstract: A composition comprises a sulphur- and phosphorus-free, boron-containing overbased metal salt of a calixarene. The boron-containing overbased calixarene is useful in a lubricant additive composition, a lubricant composition, and a method to lubricate an internal combustion engine. The boron-containing overbased calixarene advantageously provides detergent and antiwear performance and does so without increasing the sulphur or phosphorus content of a lubricant additive or lubricant composition.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: January 6, 2004
    Assignee: The Lubrizol Corporation
    Inventors: David Cressey, David J. Moreton, D. John Durham
  • Patent number: 6669743
    Abstract: Clean distillate useful as a jet fuel or jet blending stock is produced from Fischer-Tropsch wax by separating wax into heavier and lighter fractions; further separating the lighter fraction and hydroisomerizing the heavier fraction and that portion of the light fraction above about 475° F. The isomerized product is blended with the untreated portion of the lighter fraction to produce high quality, clean, jet fuel.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: December 30, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Robert J. Wittenbrink, Paul J Berlowitz, Bruce R. Cook
  • Patent number: 6670309
    Abstract: In preparing a purified fluorine-based solvent from a fluorine-based solution comprising a lubricant based on a fluororesin having an organic terminal group and a fluorocarbon-based solvent, impurities including ionic pollutants contained in the fluorine-based solution or the lubricant are selectively removed by an adsorption process. The preparation apparatus of a purified fluorine-based solvent is also disclosed.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: December 30, 2003
    Assignee: Fujitsu Limited
    Inventors: Hiroshi Chiba, Keiji Watanabe, Eishin Yamakawa, Takeshi Tokairin
  • Patent number: 6667284
    Abstract: A magnetic recording medium and method for forming the magnetic recording medium are described. The magnetic recording medium includes a magnetic layer formed on a non-magnetic support, and a lubricant layer over the magnetic layer. The lubricant layer includes a compound selected from the group consisting of hydrocarbyl-substituted cyclopentanes, hydrocarbyl-substituted cyclopentenes, hydrocarbyl-substituted cyclopentadienes, and mixtures or derivatives thereof. The lubricant layer also may be used on a magnetic head for reading and writing information on a magnetic recording medium. The magnetic recording medium and the magnetic head may be used to manufacture computer disk drives, compact disk drives, audio equipment, and video equipment.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: December 23, 2003
    Assignee: Pennzoil-Quaker State Company
    Inventors: Selda Gunsel, Clifford Venier, I-Ching Chiu
  • Patent number: 6667285
    Abstract: The invention provides a lubricating oil for refrigerators, comprising (a) at least one ester represented by the formula (1) wherein R1 is C1 to C18 straight-chain alkyl or C3 to C18 branched-chain alkyl; R2 is H, C1 to C18 straight-chain alkyl or C3 to C18 branched-chain alkyl; with the proviso that the total number of carbons contained in the alkyls represented by R1 and R2 is 2 to 18 and that when R2 is H, R1 is branched-chain alkyl; and R3 is C1 to C20 straight-chain alkyl, C3 to C20 branched-chain alkyl or C3 to C10 cycloalkyl, optionally in combination with (b) at least one member selected from the group consisting of fatty acid polyol esters, phthalic acid esters, alicyclic dicarboxylic acid esters, polyvinyl ethers, hydrocarbon oils and polyalkylene glycols; as well as a method for lubricating a refrigerator using such a lubricating oil, and a working fluid composition for refrigerators comprising (I) component (a) or components (a) and (b) and (II) a refrigerant.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: December 23, 2003
    Assignee: New Japan Chemical Co., Ltd.
    Inventors: Yasuyuki Kawahara, Kouji Takahashi, Hirotaka Tomizawa
  • Patent number: 6660696
    Abstract: Phosphorothionate derivatives derived from cashew nut shell liquid (CNSL) for use as an thermally stable antioxidant, antiwear, friction reducing and extreme pressure additive in a lubricant composition are synthesized by the steps of (a) partially hydrogenating distilled technical cashew nut shell liquid with palladium or nickel or platinum catalyst; to hydrogenate the olefinic chain; (b) reacting partially hydrogenated technical cashew nut shell liquid with phosphorus trihalide and sulphur, the reaction being carried out at a temperature ranging from 20 to 220° C. A lubricant containing a major proportion of a material selected from the group consisting of an oil of lubricating viscosity or a grease; and remainder an additive including CNSL phosphorothionate derivative, prepared by the foregoing process.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: December 9, 2003
    Assignee: Indian Oil Corporation Limited
    Inventors: Rajeev Ranjan, Ajay Kumar Arora, Rakesh Sarin, Deepak Kumar Tuli, Ram Prakash Verma, Akhilesh Kumar Bhatnagar
  • Patent number: 6660697
    Abstract: A lubricating oil composition suitable for a trunk piston marine diesel engine. The lubricating oil composition comprises an admixture of: (A) an oil of lubricating viscosity, in a major amount; and (B) an oil-soluble complex overbased metal detergent additive, in a minor amount. The composition is substantially dispersant-free or contains 1, or less than 1, preferably less than 0.5, mass % based on the mass of the compositions, of a dispersant. The composition has a TBN in the range of 3.5 to 100, preferably 8 to 100.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: December 9, 2003
    Assignee: Infineum International Ltd.
    Inventors: Adrian Dunn, Laurent Chambard, Terence Garner
  • Patent number: 6656891
    Abstract: The invention provides a refrigerating machine oil composition by which a capillary tube is hardly clogged when a hydrofluorocarbon type, a hydrocarbon type, an ether type, a carbon dioxide type or an ammonia type is used as a refrigerant. It is a refrigerating machine oil composition in which base oil containing at least one oxygen-containing synthetic oil selected from a polyvinyl ether and a polyol ester is mixed with 1 to 20% by weight, based on the total amount of the composition, of a specific polyalkylene glycol alkyl ether or 1 to 40% by weight, based on the total amount of the composition, of an alkylbenzene having a number average molecular weight of 100 to 1,000.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: December 2, 2003
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Shuichi Sakanoue, Masahiko Takesue, Minoru Takagi
  • Patent number: 6656886
    Abstract: A water-based, phosphate-free, non-toxic, and biodegradable lubricant used for smoothing and shaping a bead of caulking compound sealant, and a method for its use, which can be easily removed from the caulking compound sealant bead after it is allowed to cure. Applied to a bead of newly dispensed caulking compound sealant, the present invention lubricant will not chemically interact with, prevent the curing of, or otherwise contaminate the caulking compound sealant. Instead, direct application of the present invention to a bead of caulking compound sealant, or application via a finger or man-made tool, and subsequent smoothing with the finger or tool will allow correction of all imperfections in the caulking bead prior to curing. Applications may include, but are not limited to, use in construction, marine, automotive, aircraft, electronic, and manufacturing industries with caulking sealants made from silicone, elastomer, urethane, polyurethane, polymers, butyls, poly-sulfide lithoseals, thiokols, and epoxys.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: December 2, 2003
    Inventor: Philip Thoralf Johnson