Patents by Inventor Stephen J. Kuhn

Stephen J. Kuhn 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).

  • Method of preparation of (substituted-thio)alkyl isothiocyanates
    Patent number: 4780557
    Abstract: A one-step process for the preparation of (substituted-thio)alkyl isothiocyanates in high yield comprising contacting a haloalkyl sulfide with a thiocyanate salt in the absence of a catalyst under reaction conditions sufficient to produce the desired (substituted-thio)alkyl isothiocyanate is disclosed. Examples of compounds produced by this process include CH.sub.3 SCH.sub.2 CH.sub.2 NCS and n-C.sub.6 H.sub.13 SCH.sub.2 CH.sub.2 NCS.The compounds produced by this process are useful as intermediates in the synthesis or ore flotation chemicals such as substituted thiocarbamates or thioureas.
    Type: Grant
    Filed: August 26, 1987
    Date of Patent: October 25, 1988
    Assignee: The Dow Chemical Company
    Inventors: George W. Sutherland, Stephen J. Kuhn