Patents by Inventor Donald L. Vargo

Donald L. Vargo 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).

  • Reduced-friability, highly cross-linked, flame-resistant, polyurethane foams
    Patent number: 4071482
    Abstract: Highly flame-resistant polyurethane foams of improved friability and reduced brittleness without a corresponding substantial increase in flame-spread or smoke-generation characteristics are prepared by incorporating into a foamable polyurethane composition an amount of a liquid organic carbonate, such as ethylene or propylene carbonate.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: January 31, 1978
    Assignee: General Latex and Chemical Corporation
    Inventors: Henry S. Hopkins, Jr., Donald L. Vargo
  • Polyisocyanurate compositions and foams of improved friability and process of preparing same
    Patent number: 4033908
    Abstract: In a process of preparing a polyisocyanurate foam, which process comprises: reacting a polyisocyanate in the presence of a trimerization catalyst and an expanding amount of an inert blowing agent to provide a polyisocyanurate foam, the improvement which comprises: carrying out the reaction in the presence of a plasticizing amount of a nonvolatile liquid carbonate to produce a polyisocyanurate foam having improved friability and dimensional stability properties.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: July 5, 1977
    Assignee: General Latex and Chemical Corporation
    Inventors: Henry S. Hopkins, Jr., Donald L. Vargo