Patents by Inventor Thomas J. Karol

Thomas J. Karol 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).

  • Method for preparation of organic molybdenum compounds
    Patent number: 5412130
    Abstract: A novel process for the preparation of 2,4-heteroatom substituted-molybdena-3,3-dioxacycloalkane compounds by reacting diol-, diamino-, thiol-alcohol and amino-alcohol compounds with a molybdenum source and in the presence of a phase transfer agent of the imidazoline type.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: May 2, 1995
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Aromatic amine derivatives of 2,5-dimercapto-1,3,4,-thiadiazoles
    Patent number: 5391756
    Abstract: Disclosed are novel compounds prepared by reacting 2,5-dimercapto-1,3,4-thiadiazole, aliphatic or aromatic aldehyde and aromatic amine in the molar ratio of 1:1:1 to 2:4:3. The 2,5-dimercapto-1,3,4-thiadiazole may be substituted in the 2-position by hydrocarbyl, terpene, polymeric and succinate residues. The compounds possess antiwear and antioxidant characteristics.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: February 21, 1995
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventors: Thomas J. Karol, Steven G. Donnelly
  • Ether derivatives of 2,5-dimercapto-1,3,4-thiadiazoles
    Patent number: 5194621
    Abstract: Disclosed are novel compounds prepared by reacting mono- or disulfide dimers of 2,5-dimercapto-1,3,4-thiadiazole with an aliphatic or aromatic alcohol and aldehyde. The compounds are effective antiwear agents and antioxidants when incorporated into lubricating compositions.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: March 16, 1993
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventors: Thomas J. Karol, Robert J. Luo
  • Succinate derivatives of 2,5-dimercapto-1,3,4-thiadiazoles
    Patent number: 5177213
    Abstract: Disclosed are novel succinic acid derivatives of 2(and 5)-2-hydroxyethylthio)-1,3,4-thiadiazole. These compounds are shown to be effective multifunctional additives for improving the anticorrosion and performance characteristics of lubricants and alcohol-based fuels.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: January 5, 1993
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Phenolic derivatives of 2,5-dimercapto-1,3,4-thiadiazoles
    Patent number: 5177212
    Abstract: Disclosed are novel compounds prepared by reacting 2,5-dimercapto-1,3,4-thiadiazole, aliphatic or aromatic aldehyde and alkylated phenol in the molar ratio of 1:1:1 to 2:2:1. The 2,5-dimercapto-1,3,4-thiadiazole may be substituted in the 2-position by terpene, polymeric and succinate residues. The compounds are effective antiwear agents and antioxidants when incorporated into lubricating compositions.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: January 5, 1993
    Assignee: R.T. Vanderbilt Company, Inc.
    Inventors: Thomas J. Karol, Steven G. Donnelly
  • Polyether glycol derivatives of 2,5-dimercapto-1,3,4-thiadiazole
    Patent number: 5138065
    Abstract: Disclosed are novel compounds prepared by reacting molar equivalents of polyether glycol with maleic anhydride and then reacting the intermediate with 2,5-dimercapto-1,3,4-thiadiazole. The compounds are dispersants or detergents, antiwear agents and antioxidants when incorporated into lubricating compositions.
    Type: Grant
    Filed: May 9, 1991
    Date of Patent: August 11, 1992
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Organic molybdenum complexes
    Patent number: 5137647
    Abstract: Novel molybdenum complexes prepared by reacting (a) a fatty oil or acid, (b) 2-(2-aminoethyl)aminoethanol and (c) a molybdenum source are described. The molybdenum complexes impart antifriction, antioxidant, and antiwear properties to lubricating compositions and decrease fuel consumption in internal combustion engines using same.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: August 11, 1992
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Fuel compositions containing polyalkylated 1,3,4-thiadiazoles
    Patent number: 5062863
    Abstract: A diesel fuel composition comprising a major portion of middle distillates and a minor wear improving amount of a 1,3,4-thiadiazole derived from 2,5-dimercapto-1,3,4-thiadiazole and one or two moles of polyolefin having 50 to 400 carbon atoms. Furthermore, the 5-position of the 2-mercapto-1,3,4-thiadiazole may be substituted by alkylthio, 2-hydroxyalkylthio, amino or hydroxy group. The 1,3,4-thiadiazole compounds are also effective dispersants when incorporated into fuel compositions.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: November 5, 1991
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Maleic derivatives of 2,5-dimercapto-1,3,4-thiadiazoles and lubricating compositions containing same
    Patent number: 5055584
    Abstract: Disclosed are reaction products of a maleic compound and 2,5-dimercapto-1,3,4-thiadiazole. The reaction products are useful as antiwear agents and antioxidants in lubricating compositions.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: October 8, 1991
    Inventor: Thomas J. Karol
  • Substituted 2,5-dimercapto-1,3,4-thiadiazoles and lubricating compositions containing same
    Patent number: 5026865
    Abstract: Disclosed are novel reaction products of 2,5-dimercapto-1,3,4-thiadiazole and epoxy compounds. These compounds are shown to be effective antiwear agents and antioxidants in lubricating compositions.
    Type: Grant
    Filed: June 3, 1987
    Date of Patent: June 25, 1991
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • 2-hydroxy-1,3,4-thiadiazoles and lubricating compositions containing same
    Patent number: 4935157
    Abstract: This invention concerns novel 2-hydroxy-5-alkylthio-1,3,4-thiadiazoles wherein the alkyl group may be substituted by hydroxy and phenoxy groups. The compounds are effective antiwear agents and antioxidants when incorporated into lubricating compositions.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: June 19, 1990
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Elastomer-compatible oxalic acid acylated alkenylsuccinimides
    Patent number: 4927562
    Abstract: Disclosed are elastomer-compatible mono- and bis-alkenylsuccinimide oxamides dispersants prepared by reacting a polyalkyleneamine succinimide with an amount of oxalic acid sufficient to react with at least 30 percent of the reactive nitrogens on the succinimide chain.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: May 22, 1990
    Assignee: Texaco Inc.
    Inventors: Thomas J. Karol, Theodore E. Nalesnik
  • Polyalkylated 1,3,4-thiadiazoles and lubricating compositions containing same
    Patent number: 4904403
    Abstract: Disclosed are novel compounds derived from 2,5-dimercapto-1,3,4-thiadiazole and one or two moles of polyolefin having 5 to 400 carbon atoms. Furthermore, the 5-position of the 2-mercapto-1,3,4-thiadiazole may be substituted by alkylthio, 2-hydroxyalkylthio, amino or hydroxy group. The compounds are effective dispersants, antiwear agents and antioxidants when incorporated into lubricating compositions.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: February 27, 1990
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Organic molybdenum complexes
    Patent number: 4889647
    Abstract: New molbdenum complexes prepared by reacting (a) a fatty oil, (b) diethanolamine and (c) a molybdenum source are described. The molybdenum complexes impart antifriction and antiwear properties to lubricating compositions and decrease fuel consumption in internal combustion engine using same.
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: December 26, 1989
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventors: Eugene V. Rowan, Thomas J. Karol, Homer H. Farmer
  • Fuel compositions containing maleic derivatives of 2,5-dimercapto-1,3,4-thiadiazole
    Patent number: 4880437
    Abstract: A diesel fuel composition comprising a major portion of middle distillates and a minor wear improving amount of a reaction product of one mole of a maleic compound and one mole of 2,5-dimercapto-1,3,4-thiadiazole which may be further reacted in the 5-position with one mole of maleic compound or one mole by alpha-pinene.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: November 14, 1989
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Fuel compositions containing terpene derivatives of 2,5-dimercapto-1,3,4-thiadiazole
    Patent number: 4795479
    Abstract: A diesel fuel composition comprising a major portion of middle distillates and a minor wear improving amount of a reaction product of one mole of a terpene and one mole of 2,5-dimercapto-1,3,4-thiadiazole which may be further reacted in the 5-position with one mole of terpene or one mole of alkyl, hydroxyalkyl, phenylalkyl and alkylated phenylalkyl compound.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: January 3, 1989
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Terpene derivatives of 2,5-dimercapto-1,3,4-thiadiazoles and lubricating compositions containing same
    Patent number: 4761482
    Abstract: Disclosed are reaction products of terpene compounds and 2,5-dimercapto-1,3,4-thiadiazole. The reaction products are useful as antiwear agents and antioxidants in lubricating compositions.
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: August 2, 1988
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Thomas J. Karol
  • Lubricating oil of improved anti-friction properties containing hydroxyhydrocarbyl mercapto ester of a C.sub.1 -C.sub.40 fatty acid such as that derived from coconut oil
    Patent number: 4758361
    Abstract: Lubricating oil, containing a beta-hydroxethyl mercapto ester of a fatty acid derived from coconut oil, is characterized by improvement in anti-wear and anti-friction properties.
    Type: Grant
    Filed: May 18, 1984
    Date of Patent: July 19, 1988
    Assignee: Texaco Inc.
    Inventor: Thomas J. Karol
  • Anti-friction additives for lubricating oils
    Patent number: 4647389
    Abstract: A lubricating oil composition containing a product prepared by reacting a natural oil with a (C.sub.2 -C.sub.10) hydroxy acid and a polyamine whereby the lubricating oil is improved in anti-friction and other properties.
    Type: Grant
    Filed: August 19, 1985
    Date of Patent: March 3, 1987
    Assignee: Texaco Inc.
    Inventors: Thomas J. Karol, Harold S. Magaha, Raymond C. Schlicht
  • Reaction product of Beta-mercaptoethanol and coconut oil as diesel fuel antiwear additive
    Patent number: 4566878
    Abstract: A diesel fuel, containing the reaction product of Beta-mercaptoethanol and coconut oil, is characterized by improvement in anti-wear properties.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: January 28, 1986
    Assignee: Texaco Inc.
    Inventors: Thomas J. Karol, Rodney L. Sung