Patents by Inventor Erwin Hohl

Erwin Hohl 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).

  • Cyclic amidines useful as catalysts in the hardening of epoxide resins
    Patent number: 4698426
    Abstract: Cyclic amidines which are modified by the incorporation of additional polar groups, may be used as catalysts for hardening heat-curable resin compositions comprising polyepoxides and optionally carboxyl group-containing polymers. Such amidine catalysts yield a high reactivity, an excellent storage stability and result in elastic coatings which show a high gloss and a good resistance to solvents.
    Type: Grant
    Filed: February 7, 1985
    Date of Patent: October 6, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Hans-Joachim Kreuder, Erwin Hohl
  • Cyclic amidines, a process for their production and their use as catalysts in the hardening of epoxide resins
    Patent number: 4510288
    Abstract: Cyclic amidines which are modified by the incorporation of additional polar groups, may be used as catalysts for hardening heat-curable resin compositions comprising polyepoxides and optionally carboxyl group-containing polymers. Such amidine catalysts yield a high reactivity, an excellent storage stability and result in elastic coatings which show a high gloss and a good resistance to solvents.
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: April 9, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Hans-Joachim Kreuder, Erwin Hohl