Patents by Inventor William Covington

William Covington 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).

  • Contact lens treatment
    Patent number: 4131696
    Abstract: Hard type contact lenses, such as those made of poly methyl methacrylate, are treated with an aqueous colloidal suspension of a physiologically inert inorganic hydrous oxide to render the lens surfaces wettable by lacrimal fluids thus decreasing eye irritation and increasing wearing comfort.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: December 26, 1978
    Assignee: Burton, Parsons and Company, Inc.
    Inventor: William Covington