Patents by Inventor William A. Keim

William A. Keim 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).

  • PRINTING SHEET
    Publication number: 20010016248
    Abstract: Printing sheets comprising microporous material or compressed microporous material having an ink-receptive layer joined to at least one side of the microporous material or compressed microporous material are particularly suited for ink jet printing. Preferably the ink receptive layer comprises hydrated aluminum oxide, and binder comprising water-soluble hydroxypropyl cellulose and water-soluble poly(vinyl alcohol).
    Type: Application
    Filed: September 11, 1997
    Publication date: August 23, 2001
    Inventors: GEORGE E. ALDERFER, CHARLES T. HILL, WILLIAM A. KEIM, RICHARD A. SCHWARZ, BULENT E. YOLDAS
  • Process for preparing chlorothiolformates
    Patent number: 4320070
    Abstract: Chlorothiolformates are prepared by reacting a mercaptan with phosgene in the presence of a catalytic amount of anion exchange resin in the neutral salt form. Preferably the resin has quaternary ammonium functionality.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: March 16, 1982
    Assignee: PPG Industries, Inc.
    Inventors: James A. Cook, Jr., William A. Keim
  • Process for preparing chlorothiolformates
    Patent number: 4268456
    Abstract: Chlorothiolformates are prepared by reacting a mercaptan with phosgene in the presence of a catalytic amount of a quaternary ammonium salt.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: May 19, 1981
    Assignee: PPG Industries, Inc.
    Inventors: William A. Keim, James A. Cook, Jr.