Patents by Inventor John C. Oppelt

John C. Oppelt 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).

  • Process for the preparation of substituted .beta.-ketoanilide compounds
    Patent number: 5886223
    Abstract: There is provided a process for the preparation of substituted .beta.-ketoanilide compounds having the structural formula I ##STR1## The substituted .beta.-ketoanilide compounds are useful for the control of insect pests.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: March 23, 1999
    Assignee: American Cyanamid Company
    Inventor: John C. Oppelt
  • Polymeric pentaerythrityl phosphonates and their use as flame retardants
    Patent number: 4217267
    Abstract: Flame retardant polyolefin compositions containing polymeric pentaerythrityl phosphonates and ammonium polyphosphate.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: August 12, 1980
    Assignee: American Cyanamid Company
    Inventors: Joseph A. Hoffman, Christos Savides, John C. Oppelt
  • Light-stable polymer compositions and processes therefor
    Patent number: 4152321
    Abstract: The use of N,N-disubstituted aminoethyl esters as ultraviolet light stabilizers in polymers, particularly polypropylene, is disclosed.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: May 1, 1979
    Assignee: American Cyanamid Company
    Inventor: John C. Oppelt
  • Polymeric pentaerythrityl phosphonates and their use as flame retardants
    Patent number: RE30946
    Abstract: Flame retardant polyolefin compositions containing polymeric pentaerythrityl phosphonates and ammonium polyphosphate.
    Type: Grant
    Filed: December 12, 1980
    Date of Patent: May 25, 1982
    Assignee: American Cyanamid Company
    Inventors: Joseph A. Hoffman, Christos Savides, John C. Oppelt