Patents by Inventor Eric Cuthbertson

Eric Cuthbertson 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).

  • 2,4,5-Trichlorophenol process
    Patent number: 4237321
    Abstract: A method of making 2,4,5-trichlorophenol by chlorinating 2,5-dichlorophenol is characterized by reacting 2,5-dichlorophenol with chlorine in the presence of a liquid inert polar aprotic reaction medium such as nitrobenzene or a chlorinated hydrocarbon reaction medium, particularly 1,2-dichloroethane, and preferable a Lewis acid catalyst, particularly aluminium chloride. The product contains a higher ratio of 2,4,5-trichlorophenol to 2,3,6-trichlorophenol than has been obtainable previously.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: December 2, 1980
    Assignee: Sterling Drug Inc.
    Inventor: Eric Cuthbertson