Patents by Inventor Hugh O. O'Donnell

Hugh O. O'Donnell 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 of resolving phenylpropionic acids using .alpha.-methylbenzylamine
    Patent number: 5599969
    Abstract: A process for the production of a product which is enriched in a desired enantiomer of a phenylpropionic acid selected from ibuprofen and flurbiprofen, or their pharmaceutically acceptable salts, which comprises a resolution stage, a recrystallization stage, an optional liberation stage, and an optional salt preparation stage. A substantially racemic mixture of the phenylpropionic acid is contacted with an enantiomer of .alpha.-methylbenzylamine, in specific ratios, to produce the enantiomerically enriched product.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: February 4, 1997
    Assignee: The Boots Company PLC
    Inventors: Robert Hardy, Paul F. Coe, Adrian Hirst, Hugh O. O'Donnell