Patents by Inventor Steven N. Scannapieco

Steven N. Scannapieco 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 porous pills made by compacting polyester prepolymers
    Patent number: 4977196
    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. 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.This invention relates to an improved process for solid state polymerizing porous pills which are made by compacting fine fibers of the polyester prepolymer.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: December 11, 1990
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Steven N. Scannapieco
  • Solid state polymerization of porous pills made by compacting polyester prepolymers
    Patent number: 4849497
    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. 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.This invention relates to an improved process for solid state polymerizing porous pills which are made by compacting fine fibers of the polyester prepolymer.
    Type: Grant
    Filed: August 3, 1988
    Date of Patent: July 18, 1989
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Steven N. Scannapieco