Patents by Inventor Hans-Guenter Koban

Hans-Guenter Koban 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 ring cleavage of 2-isopropyl-5,5-dimethylthiazolidines substituted in the 4-position
    Patent number: 4731477
    Abstract: A process for the ring cleavage of 2-isopropyl-5,5-dimethylthiazolidines in aqueous acid medium at elevated temperature. Whenever the five ring in the 4-position is substituted by a carboxyl group, penicillamine is the resultant product.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: March 15, 1988
    Assignee: Degussa Aktiengesellschaft
    Inventors: Hans-Guenter Koban, Edgar Koberstein, Juergen Martens