Patents by Inventor Harry Chafetz

Harry Chafetz 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).

  • Patent number: 5445750
    Abstract: A lubricating oil composition comprising(1) a major portion of a lubricating oil of a base oil viscosity, and(2) a minor portion of an antioxidant-dispersant lubricating additive prepared by the process comprising:(a) reacting a polyethyleneamine with an alkenylsuccinic acid anhydride to form a mono- and/or bis-alkenylsuccinimide;(b) adding to said mono-and/or bis-alkenylsuccinimide, a bis(hydroxyaromatic) substituted carboxylic acid and, optionally, another acylating agent to form an acylated mono-and/or bis-alkenylsuccinimide;(c) recovering said acylated mono-and/or bis-alkenylsuccinimide.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: August 29, 1995
    Assignee: Texaco Inc.
    Inventors: Harry Chafetz, Christopher S. Liu, Brian L. Papke, Thomas A. Kennedy
  • Patent number: 5093513
    Abstract: A lower alkanol, such as methanol is oxycarbonylated with carbon monoxide and oxygen to yield e.g. dimethyl carbonate at 50.degree. C.-125.degree. C. and 300-1500 psig in the presence of as catalyst, a functionalized inorganic oxide substrate (such as silica gel) typically bearing on the surface thereof a ligand of ethyl formate and 3-aminopropyl triethoxy silane--which has been reacted with a metal salt such as CuCl.sub.2.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: March 3, 1992
    Assignee: Texaco Inc.
    Inventors: Robert A. Sawicki, Harry Chafetz
  • Patent number: 4948524
    Abstract: An additive composition prepared by reacting a polymer prepared from ethylene and at least one C.sub.3 -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 -C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene and having an average molecular weight ranging from about 5,000 to 500,000 with a nitrosodiphenylamine compound represented by the formula: ##STR1## in which R and R.sup.1 represent hydrogen or an alkyl, alkenyl, or alkoxyl radical having from 1 to 8 carbon atoms, and a lubricating oil composition containing same is provided.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: August 14, 1990
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Theodore E. Nalesnik, Robert T. Biggs, Harry Chafetz, Christopher S. Liu
  • Patent number: 4900705
    Abstract: A novel catalyst system useful in preparation of dimethyl carbonate is prepared by complexing a metal salt such as cupric chloride CuCl.sub.2 with a ligand formed by reacting a carbonyl-containing organic compound such as ethyl formate with an organosilicon compound containing alkoxy and amine fucntionality, such as 3-aminopropyltriethoxysilane.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: February 13, 1990
    Assignee: Texaco Inc.
    Inventors: Robert A. Sawicki, Harry Chafetz
  • Patent number: 4689422
    Abstract: A novel ligand system useful in preparation of dimethyl carbonate is prepared by complexing a metal salt such as cuprous chloride Cu.sub.2 Cl.sub.2 with a ligand formed by reacting a carbonyl-containing compound such as ethyl formate with an organosilicon compound such as ethyl formate with an organosilicon compound containing alkoxy and amine functionality, such as 3-aminopropyltriethoxysilane or [3-(2-aminoethyl)aminopropyl]trimethoxysilane.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: August 25, 1987
    Assignee: Texaco Inc.
    Inventors: Robert A. Sawicki, Harry Chafetz
  • Patent number: 4532058
    Abstract: Motor oil dispersants are disclosed which are made by heating alkenyl succinic anhydrides in the presence of bases and heating the resulting products with a polyamine H.sub.2 N(RNH).sub.n H or a polyamine alcohol HO(RNH).sub.n H.Also disclosed are motor oils containing from 0.10 to 10.00 weight percent of at least one such dispersant.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: July 30, 1985
    Assignee: Texaco Inc.
    Inventor: Harry Chafetz
  • Patent number: 4428848
    Abstract: Disclosed are novel compounds prepared by the reaction of an adduct of a phosphosulfurized polyisoalkylene or alpha olefin with an acidified hexavalent molybdenum salt which give enhanced copper corrosion protection relative to the non-molybdenum treated adducts when incorporated in lubricants.Also disclosed is the combination of such compounds with a zinc dialkyldithiophosphate, which combination imparts to lubricants an oxidation inhibition greater than is obtainable with either the zinc dialkyldithiophosphate or the molybdenum-containing adduct alone.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: January 31, 1984
    Assignee: Texaco Inc.
    Inventors: Stephen A. Levine, Raymond C. Schlicht, Harry Chafetz, James R. Whiteman
  • Patent number: 4396399
    Abstract: As a detergent and corrosion inhibiting fuel additive, the product resulting from the condensation reaction of a C.sub.9 to C.sub.30 alkenylsuccinic anhydride in the presence of a base to form an intermediate spirodilactone followed by the reaction of the intermediate spirodilactone with diethylenetriamine and a fuel composition containing same.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: August 2, 1983
    Assignee: Texaco Inc.
    Inventors: Benjamin J. Kaufman, Harry Chafetz
  • Patent number: 4382007
    Abstract: This invention concerns dispersant-VI improvers prepared by reacting a polyamine-derived dispersant with an oxidized ethylene-propylene polymer or ethylene-propylene-diene terpolymer. The products thus formed have a dispersancy superior to that obtained by separately blending the reactants in a lubricating oil. Also disclosed are oils containing the present dispersant-VI improvers.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: May 3, 1983
    Assignee: Texaco Inc.
    Inventors: Harry Chafetz, Richard F. Love, James O. Waldbillig
  • Patent number: 4339336
    Abstract: A quaternary ammonium succinimide salt composition represented by the formula: ##STR1## in which R is a hydrocarbyl radical having from 25 to 200 carbon atoms, R.sup.i is a divalent hydrocarbon radical having from 1 to 10 carbon atoms, R.sup.ii is a hydrocarbyl radical having from 1 to 10 carbon atoms, X has a value of 2 or 3, y has a value from 1 to 5, z has a value of 0 to 5, and X is a halide radical is provided, as well as a method of preparation and a lubricating oil composition containing same.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: July 13, 1982
    Assignee: Texaco Inc.
    Inventors: Kenneth G. Hammond, Harry Chafetz
  • Patent number: 4338206
    Abstract: A quaternary ammonium succinimide salt composition represented by the formula: ##STR1## in which R is a hydrocarbyl radical having from 25 to 200 carbon atoms, R.sub.1 is a divalent hydrocarbon radical having from 1 to 10 carbon atoms, R.sub.2 is a hydrocarbyl radical having from 1 to 10 carbon atoms, n has a value of 0 or 1, and X is a halide radical is provided, as well as a method of preparation and a lubricating oil composition containing same.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: July 6, 1982
    Assignee: Texaco Inc.
    Inventors: Kenneth G. Hammond, Harry Chafetz
  • Patent number: 4326973
    Abstract: A quaternary ammonium succinimide salt composition represented by the formula: ##STR1## in which R is a hydrocarbyl radical having from 25 to 200 carbon atoms, R.sub.1 is a divalent hydrocarbon radical having from 3-10 carbon atoms, R.sub.2 is hydrogen or an alkyl radical having from 1 to 4 carbon atoms, z has a value from 0 to 5 and X is a halide radical is provided, as well as a method of preparation and a lubricating oil composition containing same.
    Type: Grant
    Filed: January 13, 1981
    Date of Patent: April 27, 1982
    Assignee: Texaco Inc.
    Inventors: Kenneth G. Hammond, Harry Chafetz
  • Patent number: 4325876
    Abstract: A method for producing an alkenylsuccinic anhydride by reacting a mixture of an olefin polymer with maleic anhydride, the improvement which comprises reacting said reaction mixture at a temperature in the range of 100.degree. to 300.degree. C. while contacting said mixture with an oxygen-containing gas during said reaction.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: April 20, 1982
    Assignee: Texaco Inc.
    Inventors: Harry Chafetz, Gary D. Lee
  • Patent number: 4324672
    Abstract: Disclosed are molybdenum derivatives of high molecular weight alkenylsuccinimides and lubricant compositions containing such derivatives which impart dispersant, oxidation inhibition, anti-wear and friction-reducing properties to these compositions.
    Type: Grant
    Filed: June 25, 1980
    Date of Patent: April 13, 1982
    Assignee: Texaco, Inc.
    Inventors: Stephen A. Levine, Raymond C. Schlicht, Harry Chafetz
  • Patent number: 4315826
    Abstract: Disclosed are multipurpose lubricant additives which are prepared by reaction of carbon disulfide with thiomolybdenum derivatives of polyalkenylsuccinimides having basic nitrogen functions. The subject additives function as dispersants possessing excellent anti-frictional properties and impart anti-wear and anti-oxidant properties to a lubricant.
    Type: Grant
    Filed: August 19, 1980
    Date of Patent: February 16, 1982
    Assignee: Texaco Inc.
    Inventors: Raymond C. Schlicht, Stephen A. Levine, Harry Chafetz
  • Patent number: 4306070
    Abstract: A quaternary ammonium salt of an ester-lactone represented by the formula: ##STR1## in which w represents 0 or 1, x and y alternately represent 0 and 1, z has value from 0 to 4, R.sup.i, R.sup.ii, R.sup.iii and R.sup.iv, in instances where w is equal to 0, represent hydrogen or alkyl radicals at least one of which is a hydrocarbyl radical having from 50-200 carbon atoms; in instances where w is equal to 1 at least one of R.sup.i, R.sup.ii, R.sup.iii, R.sup.iv, R.sup.v or R.sup.vi, represents a hydrocarbyl radical of 50-200 carbon atoms and the remaining substituents are hydrogen or lower alkyl radicals, R is a divalent radical having from 2-10 carbon, or carbon and oxygen atoms, R.sup.vii is hydrogen or a hydrocarbyl radical, and X is an anion is provided, as well as a method of preparation and a hydrocarbon lubricating oil composition containing same.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: December 15, 1981
    Assignee: Texaco Inc.
    Inventors: Kenneth G. Hammond, Harry Chafetz
  • Patent number: 4273663
    Abstract: A quaternary ammonium salt of a diester which can be represented by the formula: ##STR1## in which R.sup.i, R.sup.ii, R.sup.iii, R.sup.iv, R.sup.v and R.sup.vi represent hydrogen, alkyl or alkenyl radicals at least one of which is a hydrocarbyl radical having from 50-200 carbon atoms, R is a divalent radical having from 2-10 carbon, or carbon and oxygen atoms, R.sup.vii is hydrogen or a hydrocarbyl radical, z has a value from 0-4 and X is an anion is provided, as well as a method of preparation and a hydrocarbon lubricating oil composition containing same.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: June 16, 1981
    Assignee: Texaco Inc.
    Inventors: Kenneth G. Hammond, Harry Chafetz
  • Patent number: 4253980
    Abstract: A quaternary ammonium salt of an ester-lacetone represented by the formula ##STR1## in which w represents 0 or 1, x and y alternately represent 0 and 1, z has value from 0 to 4, R.sup.i, R.sup.ii, R.sup.iii and R.sup.iv, in instances where w is equal to 0, represent hydrogen or akyl radicals at least one of which is a hydrocarbyl radical having from 50-200 carbon atoms; in instances where w is equal to 1 at least one of R.sup.i, R.sup.ii, R.sup.iii, R.sup.iv, R.sup.v or R.sup.vi, represents a hydrocarbyl radical of 50-200 carbon atoms and the remaining substituents are hydrogen or lower alkyl radicals, R is a divalent radical having from 2-10 carbon, or carbon and oxygen atoms, R.sup.vii is hydrogen or a hydrocarbyl radical, and X is an anion is provided, as well as a method of preparation and a hydrocarbon lubricating oil composition containing same.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: March 3, 1981
    Assignee: Texaco Inc.
    Inventors: Kenneth G. Hammond, Harry Chafetz
  • Patent number: 4251380
    Abstract: A quaternary ammonium salt of a diester represented by the formula: ##STR1## in which R.sup.i, R.sup.ii, R.sup.iii and R.sup.iv represent hydrogen, alkyl or alkenyl radicals at least one of which is a hydrocarbyl radical having from 50-200 carbon atoms, R is a divalent radical having from 2-10 carbon, or carbon and oxygen atoms, R.sup.v is hydrogen or a hydrocarbyl radical, z has a value from 0-4 and X is an anion is provided, as well as a method of preparation and a hydrocarbon lubricating oil composition containing same.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: February 17, 1981
    Assignee: Texaco Inc.
    Inventors: Kenneth G. Hammond, Harry Chafetz
  • Patent number: 4248719
    Abstract: Quaternary ammonium salts prepared by reacting an alkenylsuccinimide with a monocarboxylic acid ester provide improved dispersancy in lubricating oils, as compared with the starting alkenylsuccinimides.
    Type: Grant
    Filed: August 24, 1979
    Date of Patent: February 3, 1981
    Assignee: Texaco Inc.
    Inventors: Harry Chafetz, Gary D. Lee