Patents by Inventor Keith M DeVries

Keith M DeVries 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 substituted pyridines
    Patent number: 6291489
    Abstract: This invention relates to processes for preparing compounds of the formula (I) and to processes for preparing certain intermediates of the formula wherein R1 is nitro, amino or protected amino; R2 is H, fluoro, chloro CF3, nitro, (C1-C4)alkyl, (C1-C4)alkoxy, amino or protected amino; and X1 is OH or a suitable leaving group, used in that process. The invention also relates novel to compounds of the formulae (II).
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: September 18, 2001
    Assignee: Pfizer Inc.
    Inventors: Keith M DeVries, Robert L. Dow, Stephen W. Wright