Patents by Inventor Vincent J. Lopata

Vincent J. Lopata 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).

  • High energy electron beam curing of epoxy resin systems incorporating cationic photoinitiators
    Patent number: 5877229
    Abstract: A mixture of epoxy resins such as a semi-solid triglycidyl ether of tris (hydroxyphenyl) methane and a low viscosity bisphenol A glycidyl ether and a cationic photoinitiator such as a diaryliodonium salt is cured by irradiating with a dosage of electron beams from about 50 to about 150 kGy, forming a cross-linked epoxy resin polymer.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: March 2, 1999
    Assignee: Lockheed Martin Energy Systems, Inc.
    Inventors: Christopher J. Janke, Vincent J. Lopata, Stephen J. Havens, George F. Dorsey, Richard J. Moulton
  • Toughened epoxy resin system and a method thereof
    Patent number: 5726216
    Abstract: Mixtures of epoxy resins with cationic initiators are curable under high energy ionizing radiation such as electron beam radiation, X-ray radiation, and gamma radiation. The composition of this process consists of an epoxy resin, a cationic initiator such as a diaryliodonium or triarylsulfonium salt of specific anions, and a toughening agent such as a thermoplastic, hydroxy-containing thermoplastic oligomer, epoxy-containing thermoplastic oligomer, reactive flexibilizer, rubber, elastomer, or mixture thereof. Cured compositions have high glass transition temperatures, good mechanical properties, and good toughness. These properties are comparable to those of similar thermally cured epoxies.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: March 10, 1998
    Assignee: Lockheed Martin Energy Systems, Inc.
    Inventors: Christopher J. Janke, George F. Dorsey, Stephen J. Havens, Vincent J. Lopata