Patents by Inventor Verne R. Rinehart

Verne R. Rinehart 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).

  • Solid state polymerization of polyester prepolymers
    Patent number: 4876326
    Abstract: High molecular weight polyester resins such as polyethylene terephthalate, are sometimes produced from low molecular weight polyester prepolymers having the same composition by solid state polymerization. The low molecular weight polyester prepolymers which are used in such solid state polymerizations are normally prepared by conventional melt polymerizations and are generally in the form of pellets or chips. It has been unexpectedly found that solid state polymerization rates can be greatly improved by utilizing polyester prepolymers which are in the form of porous pills. By utilizing polyester prepolymers that are in the form of porous pills, higher molecular weights can be achieved after shorter solid state polymerization times.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: October 24, 1989
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Verne R. Rinehart
  • Solid state polymerization of polyester prepolymers
    Patent number: 4755587
    Abstract: High molecular weight polyester resins such as polyethylene terephthalate, are sometimes produced from low molecular weight polyester prepolymers having the same composition by solid state polymerization. The low molecular weight polyester prepolymers which are used in such solid state polymerizations are normally prepared by conventional melt polymerizations and are generally in the form of pellets or chips. It has been unexpectedly found that solid state polymerization rates can be greatly improved by utilizing polyester prepolymers which are in the form of porous pills. By utilizing polyester prepolymers that are in the form of porous pills, higher molecular weights can be achieved after shorter solid state polymerization times.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: July 5, 1988
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Verne R. Rinehart
  • Solid state polymerization of polyester prepolymer
    Patent number: 4165420
    Abstract: The invention relates to an improvement in the solid state polymerization of polyester prepolymer comprising the use of low molecular weight prepolymer having an intrinsic viscosity ranging from about 0.1 to about 0.35 and essentially in the form of discrete spherical beads.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: August 21, 1979
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Verne R. Rinehart
  • Process for preparing polyester resin
    Patent number: 4020049
    Abstract: The invention is a process for reacting organic dicarboxylic acid and glycol under pressure and at elevated temperature in the presence of low molecular weight polyester resin to produce low molecular weight polyester resin product which can be polymerized to high molecular weight polyester resin. The process can be operated batchwise or continuously.
    Type: Grant
    Filed: April 2, 1971
    Date of Patent: April 26, 1977
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Verne R. Rinehart