Patents by Inventor Chia-Chung Tsai

Chia-Chung Tsai 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).

  • Intermediate for synthesizing treprostinil diethanolamine and method for preparing the same
    Patent number: 9505704
    Abstract: The present invention relates to a method for treprostinil diethanolamine synthesis. The present invention also relates to a novel intermediate used in the method for treprostinil diethanolamine synthesis. The novel intermediate is shown in the following formula (II): wherein R1 and R2 are described in the description.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: November 29, 2016
    Assignee: EVERLIGHT CHEMICAL INDUSTRIAL CORPORATION
    Inventors: Shijay Gao, Chia-Chung Tsai, Tsai-Yung Chou, Yu-Min Chiang, Chi-Hsiang Yao
  • NOVEL INTERMEDIATE FOR SYNTHESIZING TREPROSTINIL DIETHANOLAMINE AND METHOD FOR PREPARING THE SAME
    Publication number: 20160152548
    Abstract: The present invention relates to a method for treprostinil diethanolamine synthesis. The present invention also relates to a novel intermediate used in the method for treprostinil diethanolamine synthesis. The novel intermediate is shown in the following formula (II): wherein R1 and R2 are described in the description.
    Type: Application
    Filed: November 6, 2015
    Publication date: June 2, 2016
    Inventors: Shijay GAO, Chia-Chung TSAI, Tsai-Yung CHOU, Yu-Min CHIANG, Chi-Hsiang YAO
  • METHOD OF PURIFICATION OF PROSTAGLANDINS INCLUDING FLUORINE ATOMS BY PREPARATIVE HPLC
    Publication number: 20140051882
    Abstract: The present invention discloses a method of purification of prostaglandins including fluorine atoms by using preparative HPLC. Tafluprost and Travoprost are prostaglandins including fluorine. The chemical structure of the impurities in crude Tafluprost and crude Travoprost also contain fluorine, therefore, the removal of the impurities is difficult. Purification by using preparative high performance liquid chromatography (HPLC) can achieve high-quality liquid bulk drugs.
    Type: Application
    Filed: February 13, 2013
    Publication date: February 20, 2014
    Applicant: EVERLIGHT USA, INC.
    Inventors: Chia-Chung TSAI, Chien-Yuh CHEN, Sen-Bau LIANG, Yu-Chi LO, Chi-Hsiang YAO
  • Anhydride derivatives of 2-(S)-(6-methoxy-2-naphtyl)-propanoic acid, preparation method and use thereof
    Patent number: 8586790
    Abstract: The present invention provides a novel anhydride derivative of 2-(S)-(6-methoxy-2-naphtyl)-propanoic acid for preparing nitrooxyalkyl esters of 2-(S)-(6-methoxy-2-naphtyl)-propanoic acid with high purity to meet requirements of the industry.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: November 19, 2013
    Assignee: Everlight USA, Inc.
    Inventors: Hao-Cheng Yang, Chia-Chung Tsai, Chi-Hsiang Yao
  • ANHYDRIDE DERIVATIVES OF 2-(S)-(6-METHOXY-2-NAPHTYL)-PROPANOIC ACID, PREPARATION METHOD AND USE THEREOF
    Publication number: 20120226068
    Abstract: The present invention provides a novel anhydride derivative of 2-(S)-(6-methoxy-2-naphtyl)-propanoic acid for preparing nitrooxyalkyl esters of 2-(S)-(6-methoxy-2-naphtyl)-propanoic acid with high purity to meet requirements of the industry.
    Type: Application
    Filed: February 8, 2012
    Publication date: September 6, 2012
    Applicant: EVERLIGHT USA, INC.
    Inventors: Hao-Cheng Yang, Chia-Chung Tsai, Chi-Hsiang Yao