Patents by Inventor Philip J. Hammond

Philip J. Hammond 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).

  • Gels containing SEPS block polymers
    Patent number: 5618882
    Abstract: Gel compositions comprising styrene-(ethylene/propylene)styrene (SEPS) block copolymer having Mw of at least 180,000 and polystyrene content of 25-45 weight percent, and at least 300 parts by weight percent, and at least 300 parts by weight of extender liquid per 100 parts by weight of the block copolymer. The extender softens the ethylene/propylene mid-blocks of the copolymer and the resulting gels have unexpectedly higher tack, temperature resistance, and extender-retaining ability than corresponding gels made with styrene(ethylene/butylene)-styrene block copolymers.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: April 8, 1997
    Assignee: Raychem Limited
    Inventors: Philip J. Hammond, John M. Hudson, Hendrik Graulus