Patents by Inventor Rolf Freiberger

Rolf Freiberger 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).

  • Lubricant and mold-release agent for the manufacture of ties
    Patent number: 4501616
    Abstract: A lubricant and release agent for the manufacture of tires containing as the active ingredient liquid polyoxypropylenediols or polyoxypropylenepolyoxyethylenediols or ethers of the diols, which liquid has a viscosity of at least 8000 mPa.times.sec. The use of the release agent of the present invention avoids the occurrence of defects in the interior surface of the vulcanized tire and improves the life of the rubber bags used in the unvulcanized carcass shell of the tire.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: February 26, 1985
    Assignee: Th. Goldschmidt AG
    Inventors: Hans-Ferdi Fink, Gotz Koerner, Rolf Freiberger
  • Lubricant and release agent for molded rubber articles
    Patent number: 4326999
    Abstract: A composition which possesses both good lubrication and release properties for use in the manufacture of molded rubber articles which comprises a mixture of a hardenable silicone resin and an oil, the oil having the property of not dissolving or swelling rubber, the weight ratio of resin to oil being from 5:1 to 1:20.
    Type: Grant
    Filed: September 25, 1979
    Date of Patent: April 27, 1982
    Assignee: Th. Goldschmidt AG
    Inventors: Hans-Ferdi Fink, Rolf Freiberger