Patents by Inventor Hans-Helmut Frey

Hans-Helmut Frey 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).

  • Thermoplastic composition comprising vinyl chloride polymer and two chlorinated polyethylenes
    Patent number: 4280940
    Abstract: The present invention relates to transparent thermoplastic compositions on the basis of vinyl chloride polymers which can easily be processed and simultaneously have a good viscosity and good resistance to light and weather. They consist of a mixture of a special vinyl chloride polymer and two different, differently chlorinated chloropolyethylenes.
    Type: Grant
    Filed: September 12, 1980
    Date of Patent: July 28, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Klug, Hans-Helmut Frey
  • Thermoplastic compositions comprising PVC and chlorinated polyethylene
    Patent number: 4113805
    Abstract: Blends of vinyl chloride polymers and chlorination products of polyolefins well suitable for dry blend technique are obtained by using a chlorinated low pressure polyethylene with a chlorine content of 38 to 42% by weight, a residue value of 55 to 70% by weight and a swelling value of less than 1% by weight, prepared from high-density polyethylene, having a density of 0.955 to 0.965 g/cm.sup.3, a melting index of 20 to 65 g/10 min and a reduced specific viscosity of 1 to 2 dl/g, under certain conditions.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: September 12, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Helmut Frey, Helmut Klug
  • Thermoplastic composition comprising pvc and chlorinated polyethylene
    Patent number: 3994995
    Abstract: Blends of vinyl chloride polymers and chlorination products of polyolefins well suitable for dry blend technique are obtained by using a chlorinated low pressure polyethylene prepared by chlorinating in aqueous hydrochloric acid, preferably in the presence of silicic acid having a large surface and a siloxane oil.
    Type: Grant
    Filed: January 3, 1975
    Date of Patent: November 30, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Helmut Frey, Helmut Klug
  • Thermoplastic composition comprising PVC and chlorinated polyethylene
    Patent number: 3940456
    Abstract: Blends of vinyl chloride polymers and chlorination products of polyolefins well suitable for dry blend technique are obtained by using a chlorinated low pressure polyethylene prepared by chlorinating in water in the presence of silicic acid and a siloxane oil.
    Type: Grant
    Filed: January 10, 1975
    Date of Patent: February 24, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Helmut Frey, Helmut Klug