Patents by Inventor William J. Kelleghan

William J. Kelleghan 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).

  • Derivatives of diphenylhexafluoropropane and polymers thereof
    Patent number: 4722985
    Abstract: Derivatives of diphenylhexafluoropropane having the formula: ##STR1## where R is an unsubstituted or substituted alkylene, an epoxy, a silyl or alkoxysilyl group; and where X and Y are hydrogen or halogen. The derivatives are useful in formulating polymer structures.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: February 2, 1988
    Assignee: Hughes Aircraft Company
    Inventors: Kreisler S. Y. Lau, William J. Kelleghan
  • Derivatives of diphenylhexafluoropropane and resins thereof
    Patent number: 4719258
    Abstract: Derivatives of diphenylhexafluoropropane having the formula: ##STR1## where R is an unsubstituted or substituted alkylene, an epoxy, a silyl or alkoxysilyl group; and where X and Y are hydrogen or halogen. The derivatives are useful in formulating polymer structures.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: January 12, 1988
    Assignee: Hughes Aircraft Company
    Inventors: Kreisler S. Y. Lau, William J. Kelleghan
  • Polymers of ethynylthiophenoxy derivatives of diphenylhexafluoropropane
    Patent number: 4708991
    Abstract: Ethynylphenyl derivatives of diphenylhexafluoropropane having the formula: ##STR1## where X is oxygen or sulfur and each of R, R.sub.1, or R.sub.2 is hydrogen or ethynyl. The compounds are useful in forming polymer structures, either homopolymers or copolymers.
    Type: Grant
    Filed: September 24, 1985
    Date of Patent: November 24, 1987
    Assignee: Hughes Aircraft Company
    Inventors: Kreisler S. Y. Lau, William J. Kelleghan
  • Ethynylthiophenoxy derivatives of diphenylhexafluoropropane
    Patent number: 4695655
    Abstract: Ethynylphenyl derivatives of diphenylhexafluoropropane having the formula: ##STR1## where X is oxygen or sulfur and each of R, R.sub.1, or R.sub.2 is hydrogen or ethynyl. The compounds are useful in forming polymer structures, either homopolymers or copolymers.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: September 22, 1987
    Assignee: Hughes Aircraft Company
    Inventors: Kreisler S. Y. Lau, William J. Kelleghan
  • Derivatives of diphenylhexafluoropropane
    Patent number: 4649207
    Abstract: Derivatives of diphenylhexafluoropropane having the formula: ##STR1## where R is an unsubstituted or substituted alkylene, an epoxy, a silyl or alkoxysilyl group; and where X and Y are hydrogen or halogen. The derivatives are useful in formulating polymer structures.
    Type: Grant
    Filed: May 13, 1986
    Date of Patent: March 10, 1987
    Assignee: Hughes Aircraft Company
    Inventors: Kreisler S. Y. Lau, William J. Kelleghan
  • Process for making bis(halophenyl)hexafluoropropanes
    Patent number: 4503254
    Abstract: A new process for preparing diphenyl derivatives of hexafluoropropane containing halogen substituents on the phenyl rings and new halogen-substituted diphenyl derivatives of hexafluoropropane prepared thereby are disclosed. The new compounds of this invention are useful as intermediates for the synthesis of high temperature polymer systems.
    Type: Grant
    Filed: March 24, 1982
    Date of Patent: March 5, 1985
    Assignee: Hughes Aircraft Company
    Inventor: William J. Kelleghan