Patents by Inventor Langer Manfred

Langer Manfred 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 guanidine hydrochloride
    Patent number: 4542240
    Abstract: Guanidine hydrochloride is produced from cyanogen chloride in a new manner. The cyanogen chloride is reacted with ammonia in the absence of a solvent at a temperature of about 140.degree. to 220.degree. C. It is advantageous to add an ammonium salt at the beginning of the reaction and to use ammonia in at least stoichiometrical amounts.
    Type: Grant
    Filed: February 24, 1981
    Date of Patent: September 17, 1985
    Assignee: Degussa Aktiengesellschaft
    Inventors: Peter Schalke, Langer Manfred, Klaus Huthmacher