Patents by Inventor Maureen M. McKenna

Maureen M. McKenna 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 tetraethyl methylenebisphosphonate
    Patent number: 5688983
    Abstract: This invention relates to a process for the preparation of tetraethyl methylenebisphosphonate by the reaction of dichloromethane with diethyl phosphite, wherein the reaction is performed in a polar aprotic solvent or mixtures thereof.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: November 18, 1997
    Assignee: Zeneca Limited
    Inventors: Michael R. Leadbetter, Richard W. Brown, Maureen M. McKenna