Patents Assigned to Bridgestone/Firestone, Inc.
  • Process for preparing diene oligomers and copolymeric oligomers
    Patent number: 5717042
    Abstract: A process and catalyst system for the preparation of diene oligomers and copolymeric oligomers is disclosed. The oligomers and copolymers are prepared in an alkane solvent from one or more 1,3-diene monomers using a secondary amine transfer agent and an anionic initiator. A catalyst system including a secondary amine transfer agent and an anionic initiator is also provided.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: February 10, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventor: James E. Hall
  • Air spring system having an integral height sensor
    Patent number: 5707045
    Abstract: An air spring system adapted to be mounted on a vehicle for absorbing road shocks exerted on the vehicle and for maintaining the vehicle body level with respect to the axles. The air spring includes an end plate and a piston sealingly connected to the open ends of a flexible elastomeric sleeve to form a pressurized fluid chamber therebetween. The flexible elastomeric sleeve rolls over the piston to allow for expansion and contraction of the chamber during shocks. A height sensor is positioned between the sleeve and the piston and in some embodiments includes elements that are molded or embedded within the sleeve and/or piston or both.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: January 13, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventor: Mark R. Easter
  • Premolded pipe flashing compositions
    Patent number: 5703154
    Abstract: A premolded EPDM pipe flashing composition comprises 100 parts by weight of an elastomeric polymer comprising from about 70 to 95 parts by weight of at least one amorphous ethylene-propylene-diene terpolymer and from 5 to about 30 parts by weight of at least one crystalline or semi-crystalline ethylene-propylene-diene terpolymer; from about 35 to 175 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof, per 100 parts of the polymer; from about 30 to 110 parts by weight of a processing material and mixtures thereof, per 100 parts of the polymer; and from about 0.6 to 7.5 parts by weight of a cure package, per 100 parts of the polymer, the cure package comprising from about 0.1 to 1.5 parts by weight sulfur and from 0.5 to 6 parts by weight of at least one sulfur vulcanizing accelerator.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: December 30, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James A. Davis, William A. Wasitis, William F. Barham
  • Mineral filled EPDM membrane compositions with improved adhesion performance
    Patent number: 5700538
    Abstract: Vulcanizable elastomeric roof sheet materials for roofing having improved adhesion performance and prepared from a polymeric composition of matter comprising at least one polymer selected from the group consisting of polyolefins prepared from monomers containing at least two carbon atoms and mixtures thereof, the polymer having a crystallinity of up to about 2 percent by weight; about 20 to 125 parts by weight of one or more mineral fillers per 100 parts of the polymer, about 50 to 110 parts by weight of one or more black-type fillers per 100 parts of the polymer; and from about 50 to 70 parts by weight of a processing material per 100 parts of the polymer and having improved peel adhesion to itself using commercially available bonding and lap- splice adhesives.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: December 23, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James A. Davis, Jeffrey W. Henegar, William F. Barham, Jr.
  • Tire tread
    Patent number: D384614
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: October 7, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: William C. Hanlon, Timothy J. Lassan
  • Tire tread
    Patent number: D384617
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: October 7, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: John J. Regallis, William C. Hanlon, Leonard F. Blankenship
  • Tire tread
    Patent number: D384618
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: October 7, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James G. Guspodin, John J. Regallis, Leonard F. Blankenship, Elizabeth M. Beutler
  • Tire tread
    Patent number: D384918
    Type: Grant
    Filed: May 8, 1996
    Date of Patent: October 14, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James G. Guspodin, Bill J. Wallet
  • Tire tread
    Patent number: D386453
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: November 18, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventor: James G. Guspodin
  • Tire tread
    Patent number: D386454
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: November 18, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventor: James G. Guspodin
  • Tire tread
    Patent number: D387312
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: December 9, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: Yasuo Himuro, James G. Guspodin
  • Tire tread
    Patent number: D387713
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: December 16, 1997
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: Timothy J. Lassan, Leonard F. Blankenship, Michel Beauvais
  • Tire tread
    Patent number: D390513
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: February 10, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James G. Guspodin, William C. Hanlon
  • Tire tread
    Patent number: D390514
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: February 10, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James G. Guspodin, Bill J. Wallet, Timothy J. Lassan
  • Tire tread
    Patent number: D390516
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: February 10, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: Timothy J. Lassan, Leonard F. Blankenship, John J. Regallis
  • Tire tread
    Patent number: D390517
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: February 10, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James G. Guspodin, Joseph F. Molnar
  • Tire tread
    Patent number: D390559
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: February 10, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James G. Guspodin, John J. Regallis, Leonard F. Blankenship
  • Tire tread
    Patent number: D390816
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: February 17, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: Timothy J. Lassan, Bill J. Wallet, Joseph F. Molnar
  • Tire tread
    Patent number: D390819
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: February 17, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: Leonard F. Blankenship, Bradley J. Wurst
  • Tire tread
    Patent number: D390820
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: February 17, 1998
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: James G. Guspodin, Timothy F. Robinson