Patents by Inventor D. Allen Butterfield

D. Allen Butterfield 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).

  • Morphine-6-sulfate analogues and their use for the treatment of pain
    Patent number: 6403602
    Abstract: 3-O-Acetylmorphine-6-sulfate analogues are potent, centrally-acting morphine derivatives. The compounds are useful for the treatment of pain.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: June 11, 2002
    Assignee: The University of Kentucky Research Foundation
    Inventors: Peter A. Crooks, Abdulghani A. Houdi, Santosh G. Kottayil, D. Allen Butterfield