Patents by Inventor Larry D. Grina

Larry D. Grina 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).

  • Lubricating oil containing dispersant viscosity index improver
    Patent number: 5520829
    Abstract: Lube oils of improved properties contain ethylene-propylene copolymer bearing moieties derived from the reaction product of allyl glycidyl ether and a heterocyclic amine such as N-(3-aminopropyl) morpholine.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: May 28, 1996
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Christopher S. Liu, Larry D. Grina, Ronald E. Jones
  • Hydrocarbon compositions containing polyolefin graft polymers
    Patent number: 4952637
    Abstract: Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived from N-vinyl pyrrolidone and phenothiazine.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: August 28, 1990
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Larry D. Grina, Ronald E. Jones, Rodney Lu-Dai Sung
  • Lubricating oil containing viscosity index improver
    Patent number: 4904404
    Abstract: A lubricating oil contains, as a multifunctional additive, a polymer such as an ethylene - propylene copolymer, bearing graft moieties derived from allyl glycidyl ether, or glycidyl methacrylate as a graft monomer polymer being functionalized with (i) N-vinyl pyrrolidone and (ii) a Mannich base formed by the reaction p-nonyl phenol, N-(aminoethyl) piperazine, and formaldehyde.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: February 27, 1990
    Assignee: Texaco Inc.
    Inventors: Christopher S. Liu, Nicholas Benfaremo, Maria M. Kapuscinski, Larry D. Grina
  • Hydrocarbon compositions containing polyolefin graft polymers
    Patent number: 4886611
    Abstract: Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived from N-vinyl pyrrolidone and phenothiazine.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: December 12, 1989
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Larry D. Grina, Ronald E. Jones, Rodney L. Sung
  • Lubricating oil containing a Mannich base
    Patent number: 4877834
    Abstract: A lubricating oil contains a carbon-carbon backbone polymer containing residual unsaturation and bearing graft moieties derived from graft monomers containing ethylenic unsaturation and an epoxide moiety, and bonded to at least one of said graft moieties through an opened epoxide moiety, a Mannich base, prepared by reaction of an amine, an aldehyde, and a hindered phenol containing an active hydrogen atom.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: October 31, 1989
    Assignee: Texaco Inc.
    Inventors: Christopher S. Liu, Donald J. Clarke, Larry D. Grina
  • Hydrocarbon compositions containing polyolefin graft polymers
    Patent number: 4877415
    Abstract: Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived from N-vinyl pyrrolidone and phenothiazine.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: October 31, 1989
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Larry D. Grina, Ronald E. Jones, Rodney L. Sung
  • Multifunctional viscosity index improver
    Patent number: 4842756
    Abstract: Lubricating oils of improved oxidative stability, dispersancy, and viscosity index contain ethylene-propylene copolymer bearing allyl glycidyl ether or glycidyl methacrylate graft monomer--which has been functionalized with 2,5-dimethyl aniline or 2,6-dimethyl morpholine.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: June 27, 1989
    Assignee: Texaco Inc.
    Inventors: Christopher S. Liu, Maria M. Kapuscinski, Larry D. Grina, Ronald E. Jones
  • Anti-oxidant system
    Patent number: 4836943
    Abstract: An oil containing a viscosity index improver of improved oxidative stability contains, as an anti-oxidant system 2,6-di-t-butylphenol and 1-3-aminopropyl-2-pipecoline.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: June 6, 1989
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Christopher S. Liu, Ronald E. Jones, Larry D. Grina
  • Hydrocarbon compositions containing polyolefin graft polymers having amine and phenothiazine grafted moieties
    Patent number: 4820776
    Abstract: Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived fron N-vinyl pyrrolidone and phenothiazine.
    Type: Grant
    Filed: April 24, 1985
    Date of Patent: April 11, 1989
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Larry D. Grina, Ronald E. Jones, Rodney L. Sung
  • Clear high-performance multifunction VI improvers
    Patent number: 4816172
    Abstract: This invention is a method of producing a clear, high-performance dispersant/antioxidant VII. The method comprising admixing a polar modifier to a VI improver during preparation process or to final product at a sufficiently high temperature to produce the desired clear, high performance VI improver.
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: March 28, 1989
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Larry D. Grina, Lee A. Brugger
  • Lubricating oil containing viscosity index improver
    Patent number: 4812261
    Abstract: Lubricating oil of improved dispersancy and anti-oxidancy contains an ethylene-propylene copolymer onto which has been graft polymerized allyl glycidyl ether, the graft polymer having been thereafter functionalized with (i) N-vinyl pyrrolidone and (ii) a Mannich base formed from N-(aminoethyl) piperazine, formaldehyde, and nonyl phenol.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: March 14, 1989
    Assignee: Texaco Inc.
    Inventors: Christopher S. Liu, Nicholas Benfaremo, Maria M. Kapuscinski, Larry D. Grina
  • Hydrocarbon containing anti-oxidant system
    Patent number: 4798678
    Abstract: An oil containing a viscosity index improver of improved oxidative stability contains, as an anti-oxidant system, 2,6-di-t-butylphenol and N-aminoethylpiperazine.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: January 17, 1989
    Assignee: Texaco Inc.
    Inventors: Christopher S. Liu, Larry D. Grina, Maria M. Kapuscinski
  • Lubricating oil containing a mannich base
    Patent number: 4780230
    Abstract: A lubricating oil contains a carbon-carbon backbone polymer containing residual unsaturation and bearing graft moieties derived from graft monomers containing ethylenic unsaturation and an epoxide moiety, and bonded to at least one of said graft moieties through an opened epoxide moiety, a Mannich base, prepared by reaction of an amine, an aldehyde, and a hindered phenol containing an active hydrogen atom.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: October 25, 1988
    Assignee: Texaco Inc.
    Inventors: Christopher S. Liu, Donald J. Clarke, Larry D. Grina
  • Hydrocarbon compositions containing polyolefin graft polymers
    Patent number: 4640788
    Abstract: Lubricants of improved properties contain ethylene-propylene copolymers bearing graft units derived from, as a functional monomer, the reaction product of (i) an unsaturated aldehyde or ketone and (ii) a primary or secondary amine which contains at least one nitrogen atom in a heterocyclic ring.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: February 3, 1987
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Christopher S. Liu, William P. Hart, Larry D. Grina