Patents by Inventor Monica H. Gent

Monica H. Gent 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).

  • Photographic developing agents containing stable, soluble, pyrazolidinones
    Patent number: 4753869
    Abstract: Salts of 1-phenyl-3-pyrazolidinones with organic sulphonic acids, which are useful photographic silver halide developing agents.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: June 28, 1988
    Assignee: Ciba-Geigy AG
    Inventors: William E. Long, Malcolm D. Tirel, Monica H. Gent, Terence C. Webb