Patents by Inventor Jason Helmke

Jason Helmke 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 synthesis of amphetamine derivatives
    Patent number: 8487134
    Abstract: The invention relates to processes for preparing acylated amphetamine, methamphetamine and dexamphetamine derivatives by reacting the parent amine with the to be-coupled acid or a salt of the to-be coupled acid which acid is optionally protected, in the presence of an alkylphosphonic acid anhydride as coupling agent and, if the acid was protected then cleaving the protecting group(s), in a one-pot reaction or in two or more separate steps.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: July 16, 2013
    Assignee: Archimica, Inc.
    Inventors: Andreas Meudt, Richard Wisdom, Jason Helmke, Quofang Qiu, Paul Meek
  • Process for the Synthesis of Amphetamine Derivatives
    Publication number: 20110196173
    Abstract: The invention relates to processes for preparing acylated amphetamine, methamphetamine and dexamphetamine derivatives by reacting the parent amine with the to be-coupled acid or a salt of the to-be coupled acid which acid is optionally protected, in the presence of an alkylphosphonic acid anhydride as coupling agent and, if the acid was protected then cleaving the protecting group(s), in a one-pot reaction or in two or more separate steps.
    Type: Application
    Filed: October 9, 2008
    Publication date: August 11, 2011
    Inventors: Andreas Meudt, Richard Wisdom, Jason Helmke, Quofang Qiu, Paul Meek