Patents by Inventor Steven D. Pastor

Steven D. Pastor 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).

  • 6-(4-Hydroxyphenyl)-4,5-dihydro-3(2h)-pyridazinones and stabilized compositions
    Patent number: 4888423
    Abstract: 6-(4-hydroxyphenyl)-4,5-dihydro-3(2H)-pyridazinones of formula I ##STR1## where R.sub.1 and R.sub.2 are independently alkyl, cycloalkyl, aryl or aralkyl, R.sub.3 and R.sub.4 are independently hydrogen or alkyl, n is 1 to 4 and T is hydrogen, alkyl, substituted alkyl, alkylene or arylene, are effective in stabilizing organic materials against oxidative, thermal and actinic degradation.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: December 19, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul A. Odorisio, Steven D. Pastor