Patents by Inventor Paul Klein

Paul Klein 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).

  • Polyurethanes prepared by reaction of organic polyisocyanate with brominated ester-containing polyols
    Patent number: 3988302
    Abstract: Brominated ester-containing polyether polyols are prepared by the sequential reaction of a polyether polyol with 4,5-dibromohexahydrophthalic anhydride or its corresponding diacid and an alkylene oxide. The resulting polyols are particularly useful in the preparation of flame-retardant polyurethane foams.
    Type: Grant
    Filed: May 24, 1974
    Date of Patent: October 26, 1976
    Assignee: Texaco Development Corporation
    Inventor: Howard Paul Klein
  • Fire retardant polyester resins
    Patent number: 3937756
    Abstract: A polymerizable fire retardant unsaturated polyester resin composition is prepared by reacting a dicarboxylic acid with a polyhydric compound and an effective amount of 4,5-dibromohexahydrophthalic anhydride or its corresponding acid. The resulting unsaturated polyester resin composition when mixed with a polymerizable monomer containing terminal unsaturation and cured exhibits improved flame resistance at low bromine concentrations.
    Type: Grant
    Filed: May 24, 1974
    Date of Patent: February 10, 1976
    Assignee: Jefferson Chemical Company, Inc.
    Inventors: Howard Paul Klein, Harold George Waddill