Patents by Inventor Hubert Harth

Hubert Harth 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 production of 2-cyanoacrylates from 2,4-dicyanoglutarates
    Patent number: 4587059
    Abstract: A process for preparing monomeric 2-cyanoacrylates by reacting a dicyanoglutarate with formaldehyde in the presence of water and under acid pH conditions, then removing the water and thermolyzing the intermediate reaction product.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: May 6, 1986
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Hubert Harth, Willi Wuest, Hans-Athanas Bruhn, Miklos Danielisz, Erbo Heinrich
  • Process for the preparation of lead and zinc cyanurates
    Patent number: 4507270
    Abstract: Lead and zinc cyanurates are known to be suitable as the active ingredients in corrosion inhibiting coating compositions. The invention provides a simplified method of preparing these compounds by reacting lead or zinc oxide with cyanuric acid in an aqueous paste mixture at a somewhat elevated temperature without requiring the presence of a catalyst while applying a shearing force to said paste mixture.
    Type: Grant
    Filed: December 14, 1982
    Date of Patent: March 26, 1985
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Hubert Harth, Martin Witthaus, Wolfgang Gress