Patents by Inventor Richard M. Crooker

Richard M. Crooker 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).

  • Stabilized 141b
    Patent number: 5169874
    Abstract: HCFC blowing agents such as 141b which are stabilized with alpha-pinene oxide, limonene dioxide, or 1,2-hexadecene oxide.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: December 8, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, John A. Murphy
  • Inhibited 141b
    Patent number: 5169995
    Abstract: Storage-stable compositions of 141b which are inhibited against decomposition with additives such as alpha-methylstyrene.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: December 8, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, James P. Lavelle, Maher Y. Elsheikh
  • Stabilized 14 lb
    Patent number: 5135680
    Abstract: HCFC blowing agents such as 14lb which are stabilized with alpha-pinene oxide, limonene dioxide, or 1,2-hexadecene oxide.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: August 4, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, John A. Murphy
  • Polyurethane foams from isocyanate, polyester polyol and chlorodifluoromethane
    Patent number: 4636529
    Abstract: Process for manufacture of polyurethane and poly(urethane/isocyanate) foams utilizing higher levels of aromatic polyester polyols in the polyol component through the substitution of CHClF.sub.2 for at least a portion of the conventional blowing agents to provide a foamed product of lower combustibility and lower brittleness.
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: January 13, 1987
    Assignee: Pennwalt Corporation
    Inventor: Richard M. Crooker