Patents by Inventor Stephen M. Stefanick

Stephen M. Stefanick 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 METHYLPHENIDATE AND PHARMACEUTICAL SALTS THEREOF
    Publication number: 20150133667
    Abstract: The present invention is directed to an improved process for the preparation of methylphenidate, stereoisomer, mixture of stereoisomers and pharmaceutically acceptable salts thereof, more particularly, the sulfate and hydrochloride salts of methylphenidate, di-threo-methylphenidate and dex-methylphenidate. Methods of removing or reducing the amount of impurities from the above described process are also disclosed.
    Type: Application
    Filed: October 29, 2014
    Publication date: May 14, 2015
    Inventors: Charla Barr, Mark C. Dobish, Brian J. Smith, Stephen M. Stefanick
  • PROCESS FOR THE PREPARATION OF METHYLPHENIDATE AND PHARMACEUTICAL SALTS THEREOF
    Publication number: 20150133668
    Abstract: The present invention is directed to an improved process for the preparation of methylphenidate, stereoisomer, mixture of stereoisomers and pharmaceutically acceptable salts thereof, more particularly, the sulfate and hydrochloride salts of methylphenidate, di-threo-methylphenidate and dex-methylphenidate. Methods of removing or reducing the amount of impurities from the above described process are also disclosed.
    Type: Application
    Filed: October 29, 2014
    Publication date: May 14, 2015
    Inventors: Brian J. Smith, Stephen M. Stefanick, Charla Barr, Mark C. Dobish