Patents by Inventor Gilbert C. Collins

Gilbert C. Collins 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).

  • Metal diphthalocyanine electrochromic displays and electrolytes therefor
    Patent number: 4427267
    Abstract: The lifetime of a metal diphthalocyanine electrochromic display can be substantially extended by employing a predominantly non-aqueous low hydroxyl ion electrolyte. A preferred electrolyte solvent is ethylene glycol and preferred conductivity salts are tetraethyl ammonium fluoride and sodium chloride. In the case of sodium chloride, conductivity is improved by the addition of up to 25% water to the electrolyte.
    Type: Grant
    Filed: October 2, 1981
    Date of Patent: January 24, 1984
    Assignee: International Business Machines Corporation
    Inventors: Gilbert C. Collins, David J. Schiffrin