Patents by Inventor Wilfried Hatke

Wilfried Hatke 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).

  • Cycloolefin polymers
    Patent number: 5610253
    Abstract: The present invention relates to a cycloolefin polymer having a solution viscosity <0.25 dl/g, comprising polymerized units of at least one cycloolefin and, if desired, polymerized units of one or more acyclic olefins, wherein the cycloolefin polymer has at one or both ends an olefinically unsaturated group having at least 3 carbon atoms.
    Type: Grant
    Filed: July 11, 1995
    Date of Patent: March 11, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wilfried Hatke, Frank Osan
  • Thermotropic polymers containing 2,5-dicarboxythiophene units
    Patent number: 5510455
    Abstract: A new class of thermotropic liquid crystalline polymers comprises monomers units I, II, III, and IV, where ##STR1## Ar.sup.1, Ar.sup.2 and Ar.sup.3 are each independently selected from the group consisting of 1,3-phenylene, 1,4-phenylene, 2,6-naphthylene, 2,7-naphthylene, 4,4'-biphenylene, bis-aryl moieties having the formula ##STR2## and mixtures thereof. In the bis-aryl moieties, each X can be S, O, CO, SO, SO.sub.2, C(CH.sub.3).sub.2 or C(CF.sub.3).sub.2.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: April 23, 1996
    Assignee: Hoechst Celanese Corp.
    Inventor: Wilfried Hatke
  • Pseudo network condensation polymers
    Patent number: 5306800
    Abstract: Pseudo network polymer is characterized by a network of linear segments which is composed of recurring units of a multivalent branching moiety, a chain-defining moiety, and a coupling moiety. The polymer may be formed into film, fiber and molded articles which exhibit improved mechanical properties in the transverse direction.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: April 26, 1994
    Assignee: Hoechst Celanese Corp.
    Inventors: Balaram Gupta, Larry F. Charbonneau, Wilfried Hatke