Patents by Inventor Wen-Chun Zhang

Wen-Chun Zhang 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).

  • Patent number: 12269810
    Abstract: The present disclosure relates to the preparation of synthetic cannabinoid derivatives of Formulae I and II, and compositions made therefrom.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: April 8, 2025
    Assignee: PURISYS, LLC
    Inventors: Wen-Chun Zhang, Aaron P Honeycutt
  • Publication number: 20230219916
    Abstract: The present disclosure relates to the preparation of synthetic cannabinoid derivatives of Formulae I and II, and compositions made therefrom.
    Type: Application
    Filed: April 29, 2021
    Publication date: July 13, 2023
    Inventors: Wen-Chun Zhang, Aaron P. Honeycutt
  • Publication number: 20220274942
    Abstract: The present disclosure relates to the preparation of synthetic cannabinol and homologs thereof having the structure of Formula (I), wherein, n is 1, 2, 3 or 4. The methods described herein provide for high yields and purity in a one-pot synthesis or high yields and purity without the need for lengthy column chromatography. The present disclosure also relates to solid forms of cannabinol.
    Type: Application
    Filed: July 24, 2020
    Publication date: September 1, 2022
    Inventors: Charla Barr, Achintya Sujan, Wen-Chun Zhang, Akram M. Hazeen, Joshua K. Hoerner
  • Publication number: 20220242810
    Abstract: The application relates to crystalline cannabigerol comprising at least one X-ray powder diffraction peak selected from the group consisting of 4.73°, 9.52°, 14.30°, and 23.93° 2?(each ±0.20° 2?), to methods of making the crystalline cannabigerol and its medical uses.
    Type: Application
    Filed: June 12, 2020
    Publication date: August 4, 2022
    Inventors: Wen-Chun Zhang, Phillip Wilkerson, Gnel Mkrtchyan
  • Patent number: 11136318
    Abstract: The present disclosure relates to the preparation of methyl 2-(1H-indole-3-carbonyl)thiazole-4-carboxylate (ITE) and related compounds with high yield, purity, and scalability. The processes apply the use of a Weinreb amide intermediate as a scaffold for the preparation of ITE and structural analogs.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: October 5, 2021
    Assignee: Noramco, LLC
    Inventors: Martin Benedict Strack, Jasper Kaiser, Gnel Mkrtchyan, Wen-Chun Zhang
  • Publication number: 20210009579
    Abstract: The present disclosure relates to the preparation of methyl 2-(1H-indole-3-carbonyl)thiazole-4-carboxylate (ITE) and related compounds with high yield, purity, and scalability. The processes apply the use of a Weinreb amide intermediate as a scaffold for the preparation of ITE and structural analogs.
    Type: Application
    Filed: June 19, 2020
    Publication date: January 14, 2021
    Inventors: Martin Benedict Strack, JASPER KAISER, GNEL MKRTCHYAN, WEN-CHUN ZHANG
  • Patent number: 10406153
    Abstract: The invention is directed to processes for the preparation of benzhydrocodone hydrochloride. More particularly, the invention is directed to processes for a one-pot synthesis of benzhydrocodone hydrochloride of improved yield and/or purity.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: September 10, 2019
    Assignee: Noramco, Inc.
    Inventors: Wen-Chun Zhang, Bruce P. Johnson
  • Patent number: 10287296
    Abstract: An invention includes a process for the preparation of (S)-2((4R,4aS,6R,7R,7aR,12bS)-7,9-dimethoxy-1,2,3,4,5,6,7,7a-octahydro-4a,7-ethano-4,12-methanobenzofuro[3,2-e]isoquinolin-6-yl)-3,3-dimethylbutan-2-ol.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: May 14, 2019
    Assignee: Noramco, Inc.
    Inventor: Wen-Chun Zhang
  • Publication number: 20180055836
    Abstract: The invention is directed to processes for the preparation of benzhydrocodone hydrochloride. More particularly, the invention is directed to processes for a one-pot synthesis of benzhydrocodone hydrochloride of improved yield and/or purity.
    Type: Application
    Filed: August 31, 2017
    Publication date: March 1, 2018
    Applicant: Noramco, Inc.
    Inventors: Wen-Chun ZHANG, Bruce P. JOHNSON
  • Publication number: 20170101415
    Abstract: An invention includes a process for the preparation of (S)-2((4R,4aS,6R,7R,7aR,12bS)-7,9-dimethoxy-1,2,3,4,5,6,7,7a-octahydro-4a,7-ethano-4,12-methanobenzofuro[3,2-e]isoquinolin-6-yl)-3,3-dimethylbutan-2-ol.
    Type: Application
    Filed: October 12, 2016
    Publication date: April 13, 2017
    Applicant: Noramco, Inc.
    Inventor: Wen-Chun Zhang
  • Patent number: 8058439
    Abstract: The present invention is directed to processes for preparing oxycodone base and oxycodone hydrochloride compositions having less than 10 ppm of 14-hydroxycodeinone.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: November 15, 2011
    Assignee: Noramco, Inc.
    Inventors: D. Phillip Cox, Yong Zhang, Wen-Chun Zhang, Karen E. James
  • Publication number: 20110144340
    Abstract: The present invention is directed to processes for preparing oxycodone base and oxycodone hydrochloride compositions having less than 10 ppm of 14-hydroxycodeinone.
    Type: Application
    Filed: January 20, 2011
    Publication date: June 16, 2011
    Inventors: D. Phillip Cox, Yong Zhang, Wen-Chun Zhang, Karen E. James
  • Patent number: 7906647
    Abstract: The present invention is directed to processes for preparing oxycodone base and oxycodone hydrochloride compositions having less than 10 ppm of 14-hydroxycodeinone.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: March 15, 2011
    Assignee: Noramco, Inc.
    Inventors: D. Phillip Cox, Yong Zhang, Wen-Chun Zhang, Karen E. James
  • Publication number: 20080139814
    Abstract: The present invention is directed to processes for preparing oxycodone base and oxycodone hydrochloride compositions having less than 10 ppm of 14-hydroxycodeinone.
    Type: Application
    Filed: December 4, 2007
    Publication date: June 12, 2008
    Inventors: D. Phillip Cox, Yong Zhang, Wen-Chun Zhang, Karen E. James
  • Patent number: 6809207
    Abstract: The present invention provides certain alpha-amino acids and derivatives thereof, such as, but not limited to, esters, amides and salts. These derivatives may comprise such representative side groups as a phenyl, pyridyl, piperidinyl, tetrahydropyranyl, tetrahydrothiopyranyl, or thienyl group. The present invention further provides a method for synthesizing alpha-amino acids and derivatives thereof via a modified Ugi type reaction using an aldehyde, ammonium formate and a C1-C5 alkyl isocyanide. The compounds provided by this method are useful in the development of new pharmaceuticals for the treatment of human diseases.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: October 26, 2004
    Assignee: PharmaCore, Inc.
    Inventors: Sekar Alla, Seung-Yong Choi, Dale Dhanoa, Elso DiFranco, Galina Krokhina, Keqiang Li, Balasubramanian Thiagarajan, Wen-Chun Zhang
  • Publication number: 20030064976
    Abstract: The present invention provides certain alpha-amino acids and derivatives thereof, such as, but not limited to, esters, amides and salts. The present invention also provides a novel method for the synthesis of alpha-amino acids and derivatives thereof.
    Type: Application
    Filed: July 24, 2002
    Publication date: April 3, 2003
    Inventors: Sekar Alla, Seung-Yong Choi, Dale Dhanoa, Elso DiFranco, Galina Krokhina, Keqiang Li, Thiagarajan Balasubramanian, Wen-Chun Zhang