Patents by Inventor Hans-Hermann Grossmann

Hans-Hermann Grossmann 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).

  • Substituted ureido-s-triazines
    Patent number: 3957780
    Abstract: Hydroxyphenyl-ureido-s-triazines are prepared by reacting 4H-1,3-benzoxazin-4-ones with guanyl urea. The triazine derivatives are useful as UV stabilizers for plastic materials.
    Type: Grant
    Filed: October 4, 1974
    Date of Patent: May 18, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Hans-Hermann Grossmann
  • Moulding composition based on poly(oxymethylene)
    Patent number: 3940365
    Abstract: Polyacetals can be stabilized by means of a stabilizing composition, one of its components acting concurrently as a nucleating agent. Linear oxymethylene-polymers are used as polyacetals. The stabilizing composition consists of an urea-like compound and a phenolic anti-oxidation agent. Moulding compositions based on these stabilized polyacetals are appropriate for being worked-up in the thermoplastic state to shaped articles of all kinds.
    Type: Grant
    Filed: September 26, 1974
    Date of Patent: February 24, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Hermann Grossmann, Karlheinz Burg, Gunter Sextro
  • Moulding composition based on poly(oxymethylene)
    Patent number: 3931102
    Abstract: A moulding composition based on poly(oxymethylene) containing a substituted ureido-s-triazine as nucleating and stabilizing agent is an excellent engineering plastic useful for preparing shaped articles having stable dimensions and an exact size.
    Type: Grant
    Filed: October 4, 1974
    Date of Patent: January 6, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Hermann Grossmann, Karlheinz Burg, Gunter Sextro