Patents by Inventor Ian A. Pretswell

Ian A. Pretswell 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).

  • Pharmaceutical piperazine compounds
    Patent number: 5935955
    Abstract: A piperazinedione of general formula (I): ##STR1## wherein R.sup.1 is selected from hydrogen;a group of formula --(NH).sub.t --COR.sup.3 wherein t is 0 or 1 and R.sup.3 is an organic substituent as defined herein;a group of formula (D): ##STR2## and a group of formula (E): ##STR3## and the pharmaceutically acceptable salts thereof are useful as modulators of multi-drug resistance.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: August 10, 1999
    Assignee: Xenova Limited
    Inventors: Philip A. Ashworth, Sukhjit Hunjan, Ian A. Pretswell, Harnish Ryder, Stephen J. Brocchini