Patents by Inventor Junmin Huang

Junmin Huang 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).

  • METHOD FOR SYNTHESIZING 1H-FURO[3,2-B]IMIDAZO[4,5-D]PYRIDINE COMPOUND
    Publication number: 20250171458
    Abstract: Provided is a method for synthesizing 1H-furo[3,2-b]imidazo[4,5-d]pyridine compounds. The method comprises the following steps of: reacting compound 1 with compound 2 in a solvent in the presence of a base to obtain compound 3; subjecting the compound 3 to a reduction reaction to obtain compound 4; and subjecting the compound 4 to a ring-closing reaction with compound 5 or compound 5? to obtain compound 6 or a hydrate thereof, wherein R is methyl or ethyl, the methyl or ethyl is optionally substituted by hydroxyl, and X?O or CH2. The method for synthesizing the 1H-furo[3,2-b]imidazo[4,5-d]pyridine compound has the advantages of high yield, fewer impurities and is easy to control, saves the cost. The method is simple and convenient to operate, and is suitable for industrial scale.
    Type: Application
    Filed: December 19, 2022
    Publication date: May 29, 2025
    Applicant: HANGZHOU HIGHLIGHTLL PHARMACEUTICAL CO., LTD
    Inventors: Congxin Liang, Shuangjiang Li, Junmin Huang, Guoqiang Shi, Yaya Duan, Pucha Yan
  • High stability polyionic liquid salts
    Patent number: 8481722
    Abstract: Polyionic liquid salts are provided comprising polycationic or polyanionic molecules. Further provided are solvents comprising one or more polyionic liquid salts, and the use of such polyionic liquid salts as stationary phases in gas chromatography, and as a reagent in electrospray ionization-mass spectrometry (ESI-MS).
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: July 9, 2013
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: Daniel W Armstrong, Junmin Huang
  • HIGH STABILITY POLYIONIC LIQUID SALTS
    Publication number: 20120083603
    Abstract: Polyionic liquid salts are provided comprising polycationic or polyanionic molecules. Further provided are solvents comprising one or more polyionic liquid salts, and the use of such polyionic liquid salts as stationary phases in gas chromatography, and as a reagent in electrospray ionization-mass spectrometry (ESI-MS).
    Type: Application
    Filed: December 13, 2011
    Publication date: April 5, 2012
    Applicant: Sigma-Aldrich Co. LLC
    Inventors: Daniel W. Armstrong, Junmin Huang
  • High stability polyionic liquid salts
    Patent number: 8097721
    Abstract: Polyionic liquid salts are provided comprising polycationic or polyanionic molecules. Further provided are solvents comprising one or more polyionic liquid salts, and the use of such polyionic liquid salts as stationary phases in gas chromatography, and as a reagent in electrospray ionization-mass spectrometry (ESI-MS).
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: January 17, 2012
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: Daniel W. Armstrong, Junmin Huang
  • High Stability Polyionic Liquid Salts
    Publication number: 20080210858
    Abstract: Polyionic liquid salts are provided comprising polycationic or polyanionic molecules. Further provided are solvents comprising one or more polyionic liquid salts, and the use of such polyionic liquid salts as stationary phases in gas chromatography, and as a reagent in electrospray ionization-mass spectrometry (ESI-MS).
    Type: Application
    Filed: January 31, 2008
    Publication date: September 4, 2008
    Inventors: Daniel W. Armstrong, Junmin Huang