Patents by Inventor Douglas John

Douglas John 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 preparing aryl piperazinyl-heterocyclic compounds with a piperazine salt
    Patent number: 5338846
    Abstract: A process for preparing a compounds of the formula ##STR1## or a pharmaceutically acceptable acid addition salt thereof, which comprises reacting a piperazine salt of the formula ##STR2## with an alkyl halide containing compound of the formula ##STR3## in water with a reagent to neutralize the hydrohalic acid and heating the mixture under conditions which are suitable to effect the coupling of said piperazine salt with said alkyl halide containing compound.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: August 16, 1994
    Assignee: Pfizer Inc.
    Inventors: Frank R. Busch, Paul Bowles, Douglas John, Meldrum Allen, Sabeto A. DiRoma, Dennis M. Godek
  • Wall mounted plant holder
    Patent number: D419810
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: February 1, 2000
    Inventor: Douglas John