Patents by Inventor Robert J. Berki

Robert J. Berki 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).

  • Stabilized polyorganosiloxane composition
    Patent number: 7651642
    Abstract: A composition comprises a polyorganosiloxane and an admixed hindered amine light stabilizer (HALS) wherein the polyorganosiloxane is free from alternating cyclic hydrocarbon residues. A method of stabilizing a polyorganosiloxane composition comprises providing a polyorganosiloxane and admixing a HALS with the polyorganosiloxane. A light bulb comprises an enclosure coated with a polyorganosiloxane composition containing a HALS.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: January 26, 2010
    Assignee: Momentive Performance Materials Inc.
    Inventors: Randall Lee Carter, Tricia Patrice Silverton, Robert J. Berki
  • Stabilized polyorganosiloxane composition
    Publication number: 20040236010
    Abstract: A composition comprises a polyorganosiloxane and an admixed hindered amine light stabilizer (HALS) wherein the polyorganosiloxane is free from alternating cyclic hydrocarbon residues. A method of stabilizing a polyorganosiloxane composition comprises providing a polyorganosiloxane and admixing a HALS with the polyorganosiloxane. A light bulb comprises an enclosure coated with a polyorganosiloxane composition containing a HALS.
    Type: Application
    Filed: March 8, 2004
    Publication date: November 25, 2004
    Inventors: Randall Lee Carter, Tricia Patrice Silverton, Robert J. Berki
  • High pressure halogen filament lamp
    Publication number: 20020130600
    Abstract: An improved high pressure halogen filament lamp is disclosed. The lamp has a filament tube attached to a base, and an outer envelope encompassing the filament tube. Reductions to the gas fill pressures of the outer envelope and filament tube increase the probability that the coated outer envelope will contain the fragments of the filament tube in cases involving explosive failure of the filament tube.
    Type: Application
    Filed: January 24, 2001
    Publication date: September 19, 2002
    Inventors: Laurence Bigio, Laszlo Lieszkovszky, Robert J. Berki