Patents Examined by E. McAvoy
  • Patent number: 6458288
    Abstract: Disclosed is a lubricating oil for compression-type refrigerator comprising, as a main component, a polyoxyalkyleneglycol derivative represented by the general formula: R1&Brketopenst;(OR2&Parenclosest;mOR3]n wherein symbols are as defined in the specification. Said lubricating oil has a favorable compatibility with refrigerants and an excellent lubricating property, and is utilized as the lubricating oil for compression-type refrigerator employing hydrogen-containing fluorocarbon compound refrigerants including R-134a.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: October 1, 2002
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Yasuhiro Kawaguchi, Nobuaki Shimizu, Masato Kaneko, Hiroshi Nagakawa
  • Patent number: 5116523
    Abstract: Sulfur derivatives of unsaturated oligomers formed from alpha-olefins of 2 to 20 carbon atoms which oligomer has a branch ratio of less than 0.19.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: May 26, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Noyes L. Avery, Linda A. Benjamin, Derek A. Law
  • Patent number: 5112508
    Abstract: An additive composition comprising a graft and amine-derivatized copolymer prepared from ethylene and at least one C.sub.3 to C.sub.10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 to C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene having an average molecular weight ranging from about 5,000 to 500,000 which has been reacted with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure and reacting said reaction intermediate with a hydrocarbon substituted or unsubstituted N-naphthylphenylenediamine and a lubricating oil composition containing same are provided.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: May 12, 1992
    Assignee: Texaco, Inc.
    Inventors: Thomas F. DeRosa, Ronald W. Von Allmen, Benjamin J. Kaufman, Rosemary J. Jennejahn
  • Patent number: 5112510
    Abstract: A lubricating oil composition exhibiting improved flow properties, specifically low temperature flow properties, and viscometric properties, particularly low temperature viscometric properties comprising lubricating oil and(i) an amount effective to improve the low temperature flow properties of said lubricating oil composition of additive consisting essentially of at least one low molecular weight non-ethylene containing polymer or interpolymer containing pendent ester groups comprising repeating methylene units derived from mixture of aliphatic alcohols, said mixture containing at least about 25 weight percent C.sub.
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: May 12, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Albert Rossi
  • Patent number: 5110489
    Abstract: A grease composition having impoved water resistance is disclosed. More specifically, the addition of a copolymer of ethylene and at least one other alpha-olefin monomer and an ethylene copolymer having an amine functionality to a base grease comprising a lubricating oil and a water insoluble thickener results in a grease composition which has excellent water resistance. In a preferred embodiment, polyisoprene is added to obtain a further improvement in water resistance.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: May 5, 1992
    Assignee: Exxon Research and Engineering Company
    Inventors: James F. Stadler, David L. Kufen, James L. Purvis
  • Patent number: 5108635
    Abstract: A composition of matter, particularly useful as a viscosity additive comprising:6 to 15 parts by weight of a 60/40-54/46 ethylene/propylene copolymer of Mw 155,000-250,000 (OCP),2 to 8 parts by weight of a poly(C.sub.1 -C.sub.20 alkyl methacrylate) of Mw 30,000-150,000 (PMA) with a PMA/OCP ratio of 1/5 to 1/1, andthe complement to 100 parts by weight of diluent oil. Also disclosed are lubricating compositions comprising the above additive composition, preferably in an amount of from 0.1 to 10% by weight based on the weight of lubricating oil.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: April 28, 1992
    Assignee: Societe Francaise d'Organo Synthese
    Inventors: Philippe Gabillet, Claudie Willemin, Bernard Chauvel
  • Patent number: 5076946
    Abstract: The addition of certain alkylamine substituted benzotriazole compounds to a lubricant imparts improved oxidation stability and rust inhibition to the lubricant.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: December 31, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: John W. Frankenfeld, Keith U. Ingold
  • Patent number: 5071447
    Abstract: An apparatus and process of steam treating carbonaceous materials under a controlled temperature and pressure. The feed material is introduced into an autoclave or similar vessel and injected with steam at a high pressure and temperature for a controlled period of time to effect thermal restructuring of the carbonaceous material and to effect a conversion of the moisture and a portion of the volatile organic constituents therein to a gaseous phase. Water, wax and tar are recovered during this process and the water may be used as a source of pre-heating feed material in another vessel while the tar may be used as a heating source since it has a high heating value. The upgraded product is allowed to cool and then removed from the reaction vessel. The invention alternatively contemplates use of a separate pre-heating chamber for the carbonaceous feed material.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: December 10, 1991
    Assignee: K-Fuel Partnership
    Inventor: Edward Koppelman
  • Patent number: 5071854
    Abstract: The invention relates to the use of compounds which act as antagonists of 5-hydroxytryptamine (5-HT) at 5-HT.sub.3 receptors for the treatment of depression.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: December 10, 1991
    Assignee: Glaxo Group Limited
    Inventor: Michael B. Tyers
  • Patent number: 5057235
    Abstract: Phosphorodithioate derivatives of oligomers of polyalphaolefins of high viscosity index for use as lubricants and lubricant additives is described.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: October 15, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Liehpao O. Farng, Andrew G. Horodysky, Derek A. Law
  • Patent number: 5055211
    Abstract: The addition of certain mixed ligand metal complexes and a metal thiophosphate to a lubricating oil results in a significant improvement in the anti-wear performance of the oil. Tin dithiocarbamate-ethoxyethylxanthate and zinc dialkyldithiophosphate are preferred additives.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: October 8, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: Jacob J. Habeeb, Gopal H. Singhal
  • Patent number: 5037564
    Abstract: A dispersing agent for use in dispersing a finely divided solid powder in a nonaqueous dispersion medium and a dispersion prepared by using the dispersing agent. The dispersing agent of this invention is a low acid value lanolin fatty acid and/or a salt of the same. By means of this dispersing agent, there can be easily obtained a homogeneous and stable nonaqueous dispersion from which the incorporated solid particles will not separate out or settle even on prolonged standing. Therefore, this dispersing agent can be used advantageously in a broad range of applications such as coatings, dyes, pigments, inks, fuels, lubricating materials and so on.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: August 6, 1991
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Shoichi Nishizaki, Tominobu Mayuzumi, Takeshi Kawano
  • Patent number: 5035820
    Abstract: Lubricating oil compositions which contain hydrogenated diene star polymers grafted with N-vinylimidazole exhibit improved engine performance when prepared by grafting the polymer in an oil mixture containing at least 6% by weight of the star polymer. The grafting is accomplished by contacting the polymer with from about 3.0 to about 5.5 wt % N-vinylimidazole when N-vinylimidazole is the sole reactant and from about 1.0 to about 5.0 wt % N-vinylimidazole when N-vinylimidazole is used in combination with N-vinylpyrrolidone.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: July 30, 1991
    Assignee: Shell Oil Company
    Inventors: Robert B. Rhodes, Rudolf J. A. Eckert
  • Patent number: 5035817
    Abstract: This invention described phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: July 30, 1991
    Assignee: The Lubrizol Corporation
    Inventor: Mary F. Salomon
  • Patent number: 5034142
    Abstract: The addition of a metal alkoxyalkylxanthate, a dixanthogen, and a metal thiophosphate to a lubricating oil results in a synergistic improvement in the antiwear performance of the oil. Nickel ethoxyethylxanthate, diethoxyethyl dixanthogen, and zinc dialkyldithiophosphate are particularly preferred additives.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: July 23, 1991
    Assignee: Exxon Research and Engineering Company
    Inventors: Jacob J. Habeeb, Gopal H. Singhal
  • Patent number: 5034144
    Abstract: Lubricating oil compositions favorably used for food processing machines are disclosed. The oil compositions exhibit highly improved oxidation stability, wear resistance and rust prevention. Raw materials quite harmless to human bodies can be used in the production of said lubricating oil composition which comprises (I) as the base oil, a saturated fatty acid glyceride represented by the following general formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each a straight-chain alkyl group and (II) as an essential component, a fatty acid in an amount of 0.001 to 5% by weight, based on the total composition.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: July 23, 1991
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Ryoji Ohgake, Mitsuo Okada, Hiroyuki Takashima
  • Patent number: 5024678
    Abstract: Process for the prevention of reduction of deposits in carburetors, injection devices or similar devices of engines, which are operated with alcohol fuels comprising 99.9 to 75 Vol.-% methanol, ethanol or a mixture thereof and at least one corrosion inhibitor characterized in that one or several polyol ethers are added to the alcohol fuels in a quantity of 15 ppm up to 1 weight-%, whereby the polyol ether(s) has (have) the general formula ##STR1## wherein R is H, linear or branched C.sub.1 -C.sub.20 -alkyl, C.sub.1 -C.sub.20 -alkenyl, polyunsaturated C.sub.1 -C.sub.20 - alkyl, C.sub.1 -C.sub.20 - cycloalkyl, mono- or bicyclo-C.sub.6 -C.sub.14 -aryl, unsubstituted or substituted, R.sub.1 is H, C.sub.1 -C.sub.8 -alkyl, unsubstituted or substituted aryl, R.sub.2 is H, C.sub.1 -C.sub.8 -alkyl, unsubstituted or substituted aryl, and R.sub.3 is OR.sub.5, SR.sub.5, N(R.sub.5).sub.2, wherein R.sub.5 is H, linear or branched C.sub.1 -C.sub.20 -alkyl, C.sub.1 -C.sub.20 -cycloalkyl, mono- and bicyclo-C.sub.6 -C.sub.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: June 18, 1991
    Assignee: DEA Mineralol Aktiengesellschaft
    Inventors: Dagmar Mertens-Gottselig, Hartmut Hammer, Heinrich Muller, Manfred Wildersohn
  • Patent number: 5021175
    Abstract: Lubricating oil additives are provided which have extreme pressure, antiwear and antioxidant properties. The additives are dithiophosphorous disymmetric bisulphides of the formula: ##STR1## wherein X and Y represent an oxygen or sulphur atom or a methylene group and R.sub.1 and R.sub.2 and R.sub.3 represent a hydrocarbon radical, a polyether, a polythioether or a hydrogen atom.The invention also relates to a process for their preparation and to lubricating compositions containing the additives.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: June 4, 1991
    Assignee: Elf France
    Inventors: Laurent Germanaud, Robert Nouguier
  • Patent number: 5017300
    Abstract: A blend of tetrafluoroethane refrigerant with at least one polymer of the following: (a) an acrylic polymer having the formula ##STR1## where R is at least one alkyl group selected from CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7 and C.sub.4 H.sub.9 ; andx is an integer from 3 to 20;and (b) random copolymers from at least one alkyl acrylate monomer wherein the alkyl group may be anywhere from CH.sub.3 -- to C.sub.18 H.sub.37 -- provided that the average chain length of the alkyl groups in a major portion of said copolymer contains from 1 to 4 carbon atoms, and, optionally, with at least one other polar or nonpolar vinyl monomer said polymer (homopolymer or copolymer) having an SUS viscosity at 100.degree. F. of at least 50 and a pour point of less than -20.degree. C. is disclosed for use in compression refrigeration.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: May 21, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stuart Raynolds
  • Patent number: RE33658
    Abstract: Synthetic lubricants comprising 15 to 45 weight percent of an ester of a monohydric alcohol of 4 to 18 carbon atoms with one or more aromatic or alkane dicarboxylic acids having 4 to 18 carbon atoms blended with 85 to 55 weight percent of one or more polyether polyols having a number average molecular weight from about 400 to 5000. The blends are compounded with antioxidants, corrosion inhibitors, and metal deactivators to produce a superior lubricant for reciprocating air compressors which gives a long life to the compressors.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: August 6, 1991
    Assignee: The Dow Chemical Company
    Inventors: Eldon L. Ward, Philip W. McGraw, Thomas J. Appleman