Patents by Inventor Steven C. Kilpatrick

Steven C. Kilpatrick 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 preparing tetrahalopyridines
    Patent number: 4891108
    Abstract: Symmetrical or 2,3,5,6-tetrahalopyridine is prepared by reacting 3,5-dihalopyridine in the liquid phase with chlorine or bromine while heating and irradiating the reactants with ultraviolet light. The reaction may be carried out with or without a chlorinated solvent. For example, 2,3,5,6-tetra-chloropyridine is prepared selectively from 3,5-dichloropyridine by chlorination at 140.degree.-150.degree. C. under ultraviolet light for 44 hours.
    Type: Grant
    Filed: March 17, 1987
    Date of Patent: January 2, 1990
    Assignee: The Dow Chemical Company
    Inventors: Steven C. Kilpatrick, Billy J. Watson