Patents by Inventor Neithart Sommer

Neithart Sommer 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).

  • Process for the preparation of a pulverulent filled rubber
    Patent number: 4250082
    Abstract: A process for the precipitation of a pulverulent filled rubber, which comprises mixing a rubber latex, a rubber solution or a rubber emulsion with a filler suspension, waterglass and a water-soluble aluminum salt at a predetermined pH value of 3.0-3.7, the pH value being kept constant by introduction of acid during the precipitation.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: February 10, 1981
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Neithart Sommer, Karl-Heinz Nordsiek, Jurgen Ehrlich
  • Organolithium-Lewis base polymerization of 1,3-butadiene and novel polybutadienes thus produced
    Patent number: 4022959
    Abstract: Homopolymers of butadiene having a vinyl content which varies substantially and decreasingly along the longitudinal axis of the macromolecule toward an end thereof are produced by conducting an organolithium-Lewis base catalyzed polymerization at a substantially constantly increasing polymerization temperature throughout the polymerization.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: May 10, 1977
    Assignee: Chemische Werke Huels Aktiengesellschaft
    Inventors: Neithart Sommer, Karl-Heinz Nordsiek
  • Process for the production of polymers having a broad molecular weight distribution
    Patent number: 4016347
    Abstract: 1,3-Butadiene is polymerized to polymers having broad molecular weight distribution in a continuous-adiabatic organolithium catalyzed polymerization in a flow pipe reactor by varying in a periodic manner the ratio of catalyst to 1,3-butadiene being charged to the reactor and mixing the polymers thus produced.
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: April 5, 1977
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Neithart Sommer, Gerhard Cuntze, Wolfgang Boehmer