Patents by Inventor Alastair lain Currie Stewart

Alastair lain Currie Stewart 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).

  • Chemical process
    Patent number: 6143899
    Abstract: A process for the preparation of 2-hydroxy-6-trifluoromethylpyridine which comprises reacting 2-fluoro-6-trifluomethylpyridine or a mixture of 2-fluoro-6-trifluoromethylpyridine and 2-chloro-6-trifluoromethylpyridine with an alkali metal hydroxide at a temperature of from 50.degree. C. to 160.degree. C. and acidifying the product so formed.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: November 7, 2000
    Assignee: Zeneca Limited
    Inventors: Alexander Pai-Yung Fung, David Dale Friese, Erwin Michael Seidel, Alan John Whitton, Alastair lain Currie Stewart, Jennifer Ann White, Raymond Vincent Heavon Jones, John Desmond Hunt