Patents by Inventor Westphal Dietmar B.

Westphal Dietmar B. 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 the production of thiocarbohydrazide
    Patent number: 4946995
    Abstract: TCH is produced by a process which does not require expensive measures to remove hydrazine. In this process, hydrazinium dithiocarbazinate is reacted with an amine other than hydrazine or a strong base, optionally in the presence of water. It is preferred that a sulfur suppressing compound also be included in the reaction mixture. The precipitated TCH is removed from the reaction mixture to leave a mother liquor. Hydrazinium-dithiocarbazinate may then be added to the mother liquor. TCH precipitates and may be readily recovered.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: August 7, 1990
    Assignee: Mobay Corporation
    Inventors: Dennis E. Jackman, Gary W. Combs, Westphal Dietmar B.