Patents by Inventor Edward P. Hibbard

Edward P. Hibbard 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).

  • Organic peroxide and organic sulfide antioxidant composition
    Patent number: 5096947
    Abstract: A composition comprises a thermoplastic or polymeric resin; an organic peroxide; and an organic sulfide antioxidant represented by Formula I, II or III: ##STR1## wherein m, n, r, R.sup.1, R.sup.2, R.sup.3, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are as set forth in the Summary of the Invention.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: March 17, 1992
    Assignee: Atochem North America, Inc.
    Inventors: Joseph M. Bohen, Edward P. Hibbard, Vasanth R. Kamath, James L. Reilly
  • Foaming and crosslinking of elastomeric and/or thermoplastic polymers
    Patent number: 4607060
    Abstract: Crosslinked elastomeric and/or thermoplastic closed-cell foams having low densities are prepared from an admixture which comprises a crosslinkable thermoplastic and/or elastomeric polymer, a free radical initiator which is activated at temperatures from about 50.degree. C. to about 350.degree. C., and a t-alkylhydrazinium salt or a carbonylhydrazine.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: August 19, 1986
    Assignee: Pennwalt Corporation
    Inventors: Chester J. Kmiec, Michael F. Novits, Edward P. Hibbard