Patents by Inventor Roman Hawrylko

Roman Hawrylko 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).

  • Foamable polyvinyl chloride compound tolerant of high heat conditions
    Publication number: 20050137341
    Abstract: A foamable PVC compound is disclosed. The compound comprises polyvinyl chloride, heat deflection temperature modifier, and optionally, a blowing agent. Conventional additives are optionally present. Profile extruded, foamed articles can be made with the compound.
    Type: Application
    Filed: December 2, 2004
    Publication date: June 23, 2005
    Inventors: Roman Hawrylko, Mark Learn
  • Use of calcium carbonate in rigid poly(vinyl chloride) compositions
    Publication number: 20050131123
    Abstract: Poly(vinyl chloride) is compounded with a chalk-like, essentially pure calcium carbonate to provide improved weathering resistance of rigid poly(vinyl chloride) articles subjected to external exposures of heat and sunlight. Blends and alloys are also disclosed. Optionally, one can add either zinc alkyl ester scavenger, organotin stabilizer, or both to further improve the effectiveness of the essentially pure calcium carbonate.
    Type: Application
    Filed: March 13, 2003
    Publication date: June 16, 2005
    Inventors: Roman Hawrylko, Peter Krause, Michel Levesque