Patents by Inventor Gary Richard Callen

Gary Richard Callen 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).

  • Methods and compositions for preparing lisdexamfetamine and salts thereof
    Patent number: 8779191
    Abstract: The invention provides methods and compositions for preparing lisdexamfetamine and salts thereof. More particularly, the invention provides, for example, methods of preparing lisdexamfetamine from D-amphetamine.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: July 15, 2014
    Assignee: Cambrex Charles City, Inc.
    Inventors: Michael J. Bauer, Gary Richard Callen, Judi Christine Humphrey, Todd Jeffrey Johnson, Matthew Wendell Schiesher
  • Methods and Compositions for Preparing Lisdexamfetamine and Salts Thereof
    Publication number: 20120157706
    Abstract: The invention provides methods and compositions for preparing lisdexamfetamine and salts thereof. More particularly, the invention provides, for example, methods of preparing lisdexamfetamine from D-amphetamine.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 21, 2012
    Inventors: Michael J. Bauer, Gary Richard Callen, Judi Christine Humphrey, Todd Jeffrey Johnson, Matthew Wendell Schiesher