Patents by Inventor Louis M. Dvoracek

Louis M. Dvoracek 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).

  • Antifoulant additives for high temperature hydrocarbon processing
    Patent number: 4810397
    Abstract: Fouling of metallic surfaces contacted with hydrocarbon oils at elevated temperatures is reduced by combining the oils with foulant-inhibiting amounts of thiadiazole compounds or triazole compounds, or aluminum compounds in combinations containing thiadiazole, triazole and acid compounds.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: March 7, 1989
    Assignee: Union Oil Company of California
    Inventor: Louis M. Dvoracek
  • Antifoulant additives for high temperature hydrocarbon processing
    Patent number: 4719001
    Abstract: Fouling of metallic surfaces contacted with hydrocarbon oils at elevated temperatures is reduced by combining the oils with foulant-inhibiting amounts of thiadiazole compounds or triazole compounds, or aluminum compounds in combinations containing thiadiazole, triazole and acid compounds.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: January 12, 1988
    Assignee: Union Oil Company of California
    Inventor: Louis M. Dvoracek
  • Antifoulant for high temperature hydrocarbon processing
    Patent number: 4444649
    Abstract: Fouling of metallic surfaces contacted with hydrocarbon oils at elevated temperatures is reduced by combining with the oil foulant-inhibiting amounts of at least one tri-substituted phosphate.
    Type: Grant
    Filed: November 15, 1982
    Date of Patent: April 24, 1984
    Assignee: Union Oil Company of California
    Inventor: Louis M. Dvoracek
  • Process and compositions for reducing fouling of heat exchange surfaces
    Patent number: 4390412
    Abstract: Fouling of metallic surfaces contacted with petroleum oils at elevated temperatures is reduced by adding to the oil small amounts of an oil-soluble N-alkylamino-alkylbenzene sulfonate, a heterocyclic amine, and phenylhydrazine.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: June 28, 1983
    Assignee: Union Oil Company of California
    Inventors: Louis M. Dvoracek, Paul W. Fischer, Milan Skripek
  • Process and compositions for reducing fouling of heat exchange surfaces
    Patent number: 4319063
    Abstract: Fouling of metallic surfaces contacted with petroleum oils at elevated temperatures is reduced by adding to the oil small amounts of an oil-soluble N-alkylamino-alkylbenzene sulfonate, a heterocyclic amine, and phenylhydrazine.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: March 9, 1982
    Assignee: Union Oil Company of California
    Inventors: Louis M. Dvoracek, Paul W. Fischer, Milan Skripek