Patents by Inventor William J. Ferrell

William J. Ferrell 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).

  • N-phenylphthalisoimides as ultraviolet radiation absorbers
    Patent number: 4857305
    Abstract: A class of N-phenylphthalisoimides is provided which demonstrate broad spectrum ultraviolet radiation absorbing capacities for protecting various substrate materials including plastics, fibers, human skin, hair and the like, from the effects of such radiation. Such compounds can be incorporated either into coating compositions for such substrates or into the substrates themselves, depending upon the substrate materials, use conditions, etc.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: August 15, 1989
    Assignee: Stepan Company
    Inventors: Randal J. Bernhardt, William J. Ferrell
  • N-phenylphthalisomides as ultraviolet radiation absorbers
    Patent number: 4788054
    Abstract: A class of N-phenylphthalisoimides is provided which demonstrate broad spectrum ultraviolet radiation absorbing capacities for protecting various substrate materials including plastics, fibers, human skin, hair and the like, from the effects of such radiation. Such compounds can be incorporated either into coating compositions for such substrates or into the substrates themselves, depending upon the substrate materials, use conditions, etc.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: November 29, 1988
    Assignee: Stepan Company
    Inventors: Randal J. Bernhardt, William J. Ferrell