Patents Examined by Ellen W. McAvoy
  • N-substituted thio alkyl phenothiazines
    Patent number: 5034019
    Abstract: This invention describes phenothiazine derivatives which are N-substituted and which contain an additional sulfur molecule in the N substituent.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: July 23, 1991
    Assignee: The Lubrizol Corporation
    Inventor: Mary F. Salomon