Patents by Inventor William George Perkins

William George Perkins 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).

  • Fast heatup polyesters using graphite as an additive
    Patent number: 6034167
    Abstract: A polyester resin is disclosed containing graphite in sufficient quantities to reduce its infrared heat up time in the reheat-blow process. The amount of graphite added is from 0.1 to 15 ppm and the average particle size is from 0.1 to 20 microns. The polyester is useful to make bottle preforms for beverage containers. Methods of making the polyester resin are also disclosed using a masterbatch or liquid slurry addition technique.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: March 7, 2000
    Assignee: Shell Oil Company
    Inventors: William Chung-Tsing Tung, Joseph P. Schirmer, William George Perkins, Nathan Lyle Pazzo
  • Cellularized polyesters
    Patent number: 5641549
    Abstract: This invention is a composition, a kit to prepare the composition, cellular sheet made from the composition and thermoformed articles made from the sheet, in which the composition comprises polyethylene terephthalate, sufficient inert gas to give a sheet density of 0.4 to 1.25 gm/cc, a polytetrafluoroethylene nucleating agent and optionally a polyolefin additive and a heat stabilizer.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: June 24, 1997
    Assignee: Shell Oil Company
    Inventors: Walter Francis Johnston, Donald Edward Richeson, William George Perkins
  • Pneumatic tire and innerliner and method for manufacture
    Patent number: H2068
    Abstract: A pneumatic tire and an innerliner for use in a pneumatic tire are provided by the invention. The innerliner comprises a multilayer structure including a barrier layer and an adhesive layer. The barrier is a blend of high chlorine content chlorinated polyethylene elastomer and low chlorine-content chlorinated polyethylene elastomer. The adhesive can include a nitrile rubber composition or an ultra high molecular weight elastomer.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: July 1, 2003
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: John Darrell Carter, Richard Robinson Smith, William George Perkins, William Chung-Tsing Tung