Patents by Inventor Burkhart Kohler

Burkhart Kohler 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).

  • Polycarbonate foams
    Patent number: 5132331
    Abstract: A foamable thermoplastic molding composition comprising:a) an aromatic polycarbonate, andb) 0.1 to 5% by weight of a hydrate of an inorganic salt, is disclosed. The salt is inert to the polycarbonate and is capable of releasing its water of hydration only at a temperature above 100.degree. C.The composition which may optionally further contain c) up to 10% by weight of a nucleating agent, and d) up to 30% by weight of glass fibers is characterized by its good pore structure.
    Type: Grant
    Filed: December 27, 1991
    Date of Patent: July 21, 1992
    Assignees: Bayer Aktiengesellschaft, Miles Inc.
    Inventors: Burkhart Kohler, Klaus Kircher, Ulrich Grigo, Klaus Horn, Wolfgang Ebert, Charles-Earl Lundy