Patents by Inventor Levett Philip Charles

Levett Philip Charles 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 the preparation of pyrazoles
    Patent number: 6699991
    Abstract: A “one-pot” process is described herein for the production of pyrazole compounds of general formula (II) comprising the steps of reacting a compound of general formula (III) with an acylating agent in the presence of a base and an optional activating agent followed by the addition of a hydrazine compound in situ.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: March 2, 2004
    Assignee: Pfizer Inc.
    Inventors: Harris Laurence James, Levett Philip Charles
  • Novel process for the preparation of pyrazoles
    Publication number: 20030144530
    Abstract: A “one-pot” process is described herein for the production of pyrazole compounds of general formula (II) 1
    Type: Application
    Filed: January 17, 2003
    Publication date: July 31, 2003
    Inventors: Harris Laurence James, Levett Philip Charles
  • Novel process for the preparation of pyrazoles
    Publication number: 20020111498
    Abstract: A “one-pot” process is described herein for the production of pyrazole compounds of general formula (II) 1
    Type: Application
    Filed: March 27, 2002
    Publication date: August 15, 2002
    Inventors: Harris Laurence James, Levett Philip Charles