Patents by Inventor Qingwei Yao

Qingwei Yao 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).

  • PREPARATION OF (-)-COCAINE HYDROCHLORIDE
    Publication number: 20210069173
    Abstract: Efficient methods are provided for large scale production of ethyl cocaine-free cocaine hydrochloride. Compositions and methods comprising administration of cocaine hydrochloride are provided.
    Type: Application
    Filed: August 25, 2020
    Publication date: March 11, 2021
    Inventors: Qingwei Yao, Se-Ho Kim
  • PREPARATION OF (-)-COCAINE HYDROCHLORIDE
    Publication number: 20190224184
    Abstract: Efficient methods are provided for large scale production of ethyl cocaine-free cocaine hydrochloride. Compositions and methods comprising administration of cocaine hydrochloride are provided.
    Type: Application
    Filed: May 16, 2018
    Publication date: July 25, 2019
    Inventors: Qingwei Yao, Se-Ho Kim
  • PREPARATION OF (-)-COCAINE HYDROCHLORIDE
    Publication number: 20190224185
    Abstract: Efficient methods are provided for large scale production of ethyl cocaine-free cocaine hydrochloride. Compositions and methods comprising administration of cocaine hydrochloride are provided.
    Type: Application
    Filed: November 13, 2018
    Publication date: July 25, 2019
    Inventors: Qingwei Yao, Se-Ho Kim
  • SYNTHESIS OF LEVOMETHADONE HYDROCHLORIDE OR DEXTROMETHADONE HYDROCHLORIDE AND METHODS FOR USE THEREOF
    Publication number: 20190002394
    Abstract: Highly efficient methods for synthesis of levomethadone hydrochloride or dextromethadone hydrochloride are provided starting from D-alanine, or L-alanine, respectively, with retention of configuration. Methods for treating a subject are provided comprising administering a composition comprising an effective amount of levomethadone hydrochloride having not more than 10 ppm dextromethadone.
    Type: Application
    Filed: June 29, 2018
    Publication date: January 3, 2019
    Inventors: Gnel Mkrtchyan, Qingwei Yao
  • Synthesis of levomethadone hydrochloride or dextromethadone hydrochloride and methods for use thereof
    Patent number: 10040752
    Abstract: Highly efficient methods for synthesis of levomethadone hydrochloride or dextromethadone hydrochloride are provided starting from D-alanine, or L-alanine, respectively, with retention of configuration. Methods for treating a subject are provided comprising administering a composition comprising an effective amount of levomethadone hydrochloride having not more than 10 ppm dextromethadone.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: August 7, 2018
    Assignee: Cody Laboratories, Inc.
    Inventors: Gnel Mkrtchyan, Qingwei Yao
  • SYNTHESIS OF LEVOMETHADONE HYDROCHLORIDE OR DEXTROMETHADONE HYDROCHLORIDE AND METHODS FOR USE THEREOF
    Publication number: 20170057909
    Abstract: Highly efficient methods for synthesis of levomethadone hydrochloride or dextromethadone hydrochloride are provided starting from D-alanine, or L-alanine, respectively, with retention of configuration. Methods for treating a subject are provided comprising administering a composition comprising an effective amount of levomethadone hydrochloride having not more than 10 ppm dextromethadone.
    Type: Application
    Filed: August 24, 2016
    Publication date: March 2, 2017
    Inventors: Gnel Mkrtchyan, Qingwei Yao
  • Recyclable and reusable ruthenium catalyst for olefin metathesis
    Publication number: 20030064884
    Abstract: There is provided an immobilized ruthenium complex for use as a catalyst. Also provided is a method of forming a recyclable catalyst for olefin metathesis by attaching a ruthenium carbene to a polymeric support.
    Type: Application
    Filed: April 4, 2002
    Publication date: April 3, 2003
    Inventor: Qingwei Yao