Patents by Inventor Roman Loza

Roman Loza 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: 4554345
    Abstract: This invention describes a process for preparing liquid polyamides comprising contacting a nitrile, amine and water in the presence of a carbon dioxide catalyst.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: November 19, 1985
    Assignee: The Standard Oil Company
    Inventors: Janice L. Greene, Roman Loza
  • Patent number: 4501881
    Abstract: This invention describes a process for preparing polyamides comprising contacting a dinitrile, a diamine and water in the presence of a dicarboxylic acid. In one embodiment, nylon-6,6 is prepared by contacting adiponitrile, hexamethylene diamine and water in the presence of adipic acid.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: February 26, 1985
    Assignee: The Standard Oil Company
    Inventors: Janice L. Greene, Roman Loza
  • Patent number: 4380623
    Abstract: This invention describes a process for preparing amides comprising contacting a nitrile, amine and water in the presence of a carbon dioxide catalyst. In one embodiment, nylon-6,6 is prepared by contacting adiponitrile, hexamethylene diamine and water in the presence of carbon dioxide.
    Type: Grant
    Filed: April 3, 1981
    Date of Patent: April 19, 1983
    Assignee: Standard Oil Company
    Inventors: Janice L. Greene, Roman Loza