Patents by Inventor David E. Chasen

David E. Chasen 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).

  • Substituted 1-aminonaphthalenes and stabilized compositions
    Patent number: 5244953
    Abstract: Substituted 1-aminonaphthalenes of formula I ##STR1## wherein n is 1-3, Ar is arylene, R.sub.1 and R.sub.2 are independently hydrogen, alkyl or phenyl, R.sub.3 is hydrogen, alkyl or substituted alkyl, and R.sub.4 and R.sub.5 have independently the same definitions as R.sub.3 or are independently aryl, substituted aryl or cycloalkyl, are effective stabilizers for lubricating oil or polymer compositions. The instant compounds are particularly effective in lubricating oil compositions when used with a diarylamine antioxidant.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: September 14, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul A. Odorisio, David E. Chasen, Stephen D. Pastor