Patents by Inventor William R. Sheehan

William R. Sheehan 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).

  • Molded rubber products
    Patent number: 4721756
    Abstract: A method of producing a molded rubber product for use in the pharmaceutical industry comprising the steps of mixing a rubber formulation including a halogenated butyl rubber and a curing system of from 0.5 to 2.0 parts by weight of zinc oxide and from 0.5 to 1.5 parts by weight of m-PBM. The parts are based upon the weight of the formulation. A sheet is formed from the mixture by feeding the mixture through a calender means. The calender sheet is molded into a molded rubber product at a pressure of at least 500 psi and at a temperature of up to 375.degree. F. for up to 5 minutes. The formed product is then removed.
    Type: Grant
    Filed: September 25, 1986
    Date of Patent: January 26, 1988
    Assignee: The West Company
    Inventors: Ming K. Louie, William R. Sheehan
  • Guitar pickup
    Patent number: D1025195
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: April 30, 2024
    Inventors: William R Sheehan, Lawrence P DiMarzio