Patents by Inventor Charles L. Perrin

Charles L. Perrin 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).

  • Production of malonic anhydrides and derivatives thereof
    Patent number: 4360691
    Abstract: Malonic anhydride and substituted malonic anhydrides are prepared by ozonolysis of the enol-lactone dimers of ketenes. The resulting malonic anhydrides can be hydrolyzed with water to form the corresponding acid, reacted with an alcohol to yield the monoester, or reacted with an amine to yield the monoamide.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: November 23, 1982
    Assignee: The Regents of the University of California
    Inventor: Charles L. Perrin
  • Production of malonic anhydrides and derivatives thereof
    Patent number: 4251447
    Abstract: Malonic anhydride and substituted malonic anhydrides are prepared by ozonolysis of the enol-lactone dimers of ketenes. The resulting malonic anhydrides can be hydrolyzed with water to form the corresponding acid, reacted with an alcohol to yield the monoester, or reacted with an amine to yield the monoamide.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: February 17, 1981
    Assignee: The Regents of the University of California
    Inventor: Charles L. Perrin