Patents by Inventor Robert D. Aylesworth

Robert D. Aylesworth 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).

  • Mixed-terminated polyester plasticizers
    Patent number: 4122057
    Abstract: Polyester plasticizers having improved low temperature properties are obtained by terminating the polyester with mixed chain-terminating agents. Mixtures of monobasic acids and monofunctional alcohols are employed for this purpose. The polyesters of this invention find particular utility as plasticizers for PVC homopolymers and copolymers.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: October 24, 1978
    Assignee: Emery Industries, Inc.
    Inventors: James Lamont, Robert D. Aylesworth, Bruce J. Beimesch
  • 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