Patents by Inventor Frederick R. Williams

Frederick R. Williams 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).

  • Thermoplastic polyester compositions containing polyamide additives
    Patent number: 4066587
    Abstract: The flow characteristics and rheological properties of thermoplastic polyesters and copolyesters are significantly improved by the addition of a polyamide resin thereto. In addition to improving the processability of the thermoplastic materials the polymeric additives also impart other desirable properties to the resulting manufactured products.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: January 3, 1978
    Assignee: Emery Industries, Inc.
    Inventors: Harold E. Mains, Frederick R. Williams, William L. O'Brien
  • Polyamide blends having improved processing characteristics
    Patent number: 4062819
    Abstract: The flow characteristics and rheological properties of high molecular weight thermoplastic polyamides are significantly improved by blending therewith a small amount of a polyamide derived from high molecular weight dibasic acids. In addition to improving the processability of the thermoplastic resin, the blends and manufactured articles produced therefrom have other desirable properties.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: December 13, 1977
    Assignee: Emery Industries, Inc.
    Inventors: Harold E. Mains, Frederick R. Williams, William L. O'Brien
  • Non-migrating polymeric plasticizers for polyvinyl chloride
    Patent number: 3972962
    Abstract: Improved chain-stopped polyester plasticizers for polyvinyl chloride homopolymers and copolymers are provided. The plasticizers show little or no tendency to migrate from PVC, yet they are readily processable with the PVC. While being extremely compatible with PVC the present plasticizers have very low affinity for ABS and polystyrene resins and therefore can be used in applications where plasticized PVC comes in contact with these other resins.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: August 3, 1976
    Assignee: Emery Industries, Inc.
    Inventors: Frederick R. Williams, Robert D. Aylesworth