Patents by Inventor John Duchek

John Duchek 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).

  • Cannabinoid crystalline derivatives and process of cannabinoid purification
    Publication number: 20060094774
    Abstract: ?9 tetrahydrocannabinol (THC) esters comprising the reaction product of THC with at least one aryl sulfonyl chloride in the presence of at least one tertiary amine. The resulting aryl sulfonic THC esters are highly crystalline and stable at room temperature in air, allowing for indefinite storage. The aryl sulfonic THC esters can be recrystallized for purification, and then hydrolyzed to recover the purified THC.
    Type: Application
    Filed: November 6, 2003
    Publication date: May 4, 2006
    Applicant: Mallinckrodt Inc.
    Inventor: John Duchek
  • Process for preparation of (+)-p-mentha-2,8-diene-1-ol
    Publication number: 20060084828
    Abstract: A process for preparing (+)-p-mentha-2,8-diene-1-ol comprising reacting (+)-limonene oxide with at least one amine in the presence of at least one Lewis acid to form amine adduct intermediates. The amine adduct is then oxidized to form an N-oxide that is pyrolized to form (+)-p-mentha-2,8-diene-1-ol.
    Type: Application
    Filed: April 14, 2004
    Publication date: April 20, 2006
    Inventors: Hong Gu, J. Killgore, John Duchek