Patents by Inventor Martin E. Packard

Martin E. Packard 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).

  • Carbanilate compound for erythemal protection
    Patent number: 3965144
    Abstract: Compounds are provided for reducing erythemal response which are photoreactive precursors to para-aminobenzoic acid or its physiologically acceptable esters. Upon exposure to ultraviolet radiation of greater than about 280nm, the compounds of this invention undergo a photoreactive degradation to provide a regulated amount of a sunscreen material which screens out ultraviolet radiation which could lead to erythema.The compounds are benzyl esters of p-carboxycarbanilic acid and the dermatological and physiological acceptable esters of the carboxy group.
    Type: Grant
    Filed: October 10, 1973
    Date of Patent: June 22, 1976
    Assignee: Syva Company
    Inventors: Martin E. Packard, Edwin F. Ullman, Terry L. Burkoth