Patents Represented by Attorney, Agent or Law Firm John Schneider
  • Thermoplastic elastomeric compositions
    Patent number: 6268438
    Abstract: A cross-linked or at least partially cross-linked thermoplastic elastomeric composition formed of from 10 to 90 percent of a first polymeric material comprised of ethylene, &agr;-olefin and optionally a non-conjugated diene, and 90 to 10 percent of a second olefin polymeric material, wherein at least one of the first or second polymeric materials is at least partially the product of a metallocene polymerization reaction.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: July 31, 2001
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Maria Dolores Ellul, Donald Ross Hazelton, Charles Cozewith, Aspy Keki Mehta
  • Low molecular weight isoolefin polymer
    Patent number: 5434221
    Abstract: A process is provided for producing a low molecular weight isoolefin polymer by contacting at conversion conditions a higher molecular weight saturated isoolefin polymer, for example, polyisobutylene or a copolymer of a C.sub.4 to C.sub.7 isoolefin and a para-alkylstyrene, in the melt phase, with an initiator, such as an oxygen-containing gas, an organic peroxide or an azo compound.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: July 18, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Donald A. White, Lawrence W. Flatley, Richard C. Yeh, Raymond F. Murphy
  • Para-alkylstyrene/isoolefin copolymers having substantially homogeneous compositional distribution
    Patent number: 5430118
    Abstract: A copolymer having a substantially homogeneous composition distribution, said copolymer comprising the direct reaction product of an isoolefin and para-alkylstrene.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: July 4, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Kenneth W. Powers, Hsien-Chang Wang
  • Para-alkylstyrene/isoolefin copolymers having substantially homogeneous compositional distribution
    Patent number: 5426167
    Abstract: A copolymer having a substantially homogeneous composition distribution, said copolymer comprising the direct reaction product of an isoolefin and para-alkylstyrene.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: June 20, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Kenneth W. Powers, Hsien-Chang Wang
  • Process for producing low molecular weight isoolefin polymers
    Patent number: 5262489
    Abstract: A process is provided for producing a low molecular weight isoolefin polymer by contacting at conversion conditions a higher molecular weight saturated isoolefin polymer, for example, polyisobutylene or a copolymer of a C.sub.4 to C.sub.7 isoolefin and a para-alkylstyrene, in the melt phase, with an initiator, such as an oxygen-containing gas, an organic peroxide or an azo compound.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: November 16, 1993
    Inventors: Donald A. White, Lawrence W. Flatley, Richard C. Yeh, Raymond F. Murphy