Patents by Inventor Peter G. Pappas

Peter G. Pappas 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).

  • Catalyzed gas-phase mono N-alkylation of aromatic primary amines
    Patent number: 5159115
    Abstract: Described are processes for the gas-phase mono N-alkylation of an aniline or an aminonaphthalene using a C.sub.1 to C.sub.5 aliphatic alcohol or ether over certain catalyst compositions based upon crystalline molecular sieves or amorphous silica-aluminas.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: October 27, 1992
    Assignee: Amoco Corporation
    Inventors: Peter G. Pappas, Judith B. Melville
  • Passivation of polyamine dispersants toward fluorohydrocarbon compositions
    Patent number: 4940552
    Abstract: Dispersants containing basic amine groups are passivated toward fluorohydrocarbon compositions by reaction with a passivating amount of a dicarboxylic acid or anhydride.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: July 10, 1990
    Assignee: Amoco Corporation
    Inventors: John A. Cengel, Peter G. Pappas
  • Dispersant viscosity index improver comprising reaction product of a styrene-maleic anhydride copolymer, an aliphatic alcohol and a tertiary amino alcohol
    Patent number: 4391721
    Abstract: Dispersant viscosity index improvers comprise the reaction product of an aliphatic alcohol or mixtures thereof, a tertiary amino alcohol and a styrene maleic anhydride copolymer.
    Type: Grant
    Filed: March 25, 1981
    Date of Patent: July 5, 1983
    Assignee: Standard Oil Company (Indiana)
    Inventor: Peter G. Pappas
  • Oxidative passivation of polyamine-dispersants
    Patent number: 4379064
    Abstract: Mild oxidation of polyamine crankcase dispersants passivates basically reacting polyamine dispersants to fluorocarbon compositions used in engines.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: April 5, 1983
    Assignee: Standard Oil Company (Indiana)
    Inventors: John A. Cengel, Mark W. Hunt, Joseph S. Strukl, Peter G. Pappas
  • Flow improver for heavy petroleum products comprising alkenyl succinate diester
    Patent number: 4255160
    Abstract: Crude oil, residuum, and vacuum gas oil containing an effective amount of a linear alpha olefin substituted succinate diester of a linear primary monohydric alcohol.
    Type: Grant
    Filed: March 9, 1979
    Date of Patent: March 10, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventors: Peter G. Pappas, Adel B. Abdul-Malek
  • Crude oils and residual fuel oils containing a terpolymer of ethylene, vinyl ester, and dialkylvinyl carbinol
    Patent number: 4015063
    Abstract: Crude oils and residual fuel oils having improved pour point and flow properties are obtained by incorporating therein a small amount of a new terpolymer prepared from ethylene, a vinyl ester, and a dialkylvinyl carbinol. The terpolymer has a number average molecular weight of about 500-10,000 and suitably contains 45-80 wt. % ethylene, 10-25 wt. % vinyl ester of a fatty acid having up to about eight carbon atoms and 10-30 wt. % dialkylvinyl carbinol wherein the alkyl groups have up to about six carbon atoms.
    Type: Grant
    Filed: June 17, 1975
    Date of Patent: March 29, 1977
    Assignee: Standard Oil Company (Indiana)
    Inventors: Robert J. Basalay, Peter G. Pappas, Walter C. Edmisten