Patents by Inventor Manfred Klepetar

Manfred Klepetar 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).

  • Method of curing polyester resin in the presence of rubber
    Patent number: 4354891
    Abstract: A method is described for achieving full cure of a peroxide cured polyester resin in the presence of rubber, which method is based on the discovery that there is competition between the uncured resin and the rubber surface for the peroxide curing agent present adjacent to the rubber/resin interface. The method has several embodiments, including: (1) utilizing a low surface activity rubber, (2) deactivating the surface of a high surface activity rubber, (3) utilizing a peroxide material at the interface, (4) utilizing a material with which the rubber surface reacts preferentially, and (5) utilizing a "rapid cure" for the polyester. Also described is a laminate of rubber and polyester resin formed by this method.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: October 19, 1982
    Assignee: Manville Service Corporation
    Inventors: Charles Lostak, John L. Sznopek, Manfred Klepetar