Patents by Inventor Weichyun Wong

Weichyun Wong 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 preparing metal salt of valproic acid
    Patent number: 8729300
    Abstract: The present invention provides a simple, safe and more efficient process for preparing metal salts of valproic acid. The process includes steps of: (i) mixing valproic acid and a metal hydroxide (either dry solid or aqueous solution) in a drier to form a reaction mixture; and (ii) removing water, which is produced during the step of mixing the valproic acid and the metal hydroxide, from the reaction mixture to obtain the desired metal salts of valproic acid.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: May 20, 2014
    Assignee: Sci Pharmtech, Inc.
    Inventors: Wen-Chih Chuo, Weichyun Wong, Yon-Lian Wu
  • Optically active methylhydroxylaminopropanol derivative and its use as intermediate for preparation of ()-(-)-3-methylamino-1-(-2-thienyl)propan-1-ol
    Patent number: 8420832
    Abstract: The present invention provides an (S)-methylhydroxylaminopropanol compound and the (S)-methylhydroxylaminopropanol compound of the present invention is used as an intermediate for preparation of (S)-(?)-3-methylamino-1-(2-thienyl)propan-1-ol, which is an intermediate for preparation of (S)-(+)-N-methyl-3-methyl-3-(1-naphthyloxy)-3-(2-thienyl)propylamine oxalate. The present invention also provides a process for preparing (S)-(+3-methylamino-1-(2-thienyl)propan-1-ol with higher yield and lower cost, wherein the (S)-methylhydroxylaminopropanol compound is used as an intermediate.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: April 16, 2013
    Assignee: Sci Pharmtech, Inc.
    Inventors: Bo-Fong Chen, Jinun-Ban Yeh, Weichyun Wong
  • OPTICALLY ACTIVE METHYLHYDROXYLAMINOPROPANOL DERIVATIVE AND ITS USE AS INTERMEDIATE FOR PREPARATION OF (S)-(-)-3-METHYLAMINO-1-(-2-THIENYL)PROPAN-1-OL
    Publication number: 20120190869
    Abstract: The present invention provides an (S)-methylhydroxylaminopropanol compound and the (S)-methylhydroxylaminopropanol compound of the present invention is used as an intermediate for preparation of (S)-(?)-3-methylamino-1-(2-thienyl)propan-1-ol, which is an intermediate for preparation of (S)-(+)-N-methyl-3-methyl-3-(1-naphthyloxy)-3-(2-thienyl)propylamine oxalate. The present invention also provides a process for preparing (S)-(+3-methylamino-1-(2-thienyl)propan-1-ol with higher yield and lower cost, wherein the (S)-methylhydroxylaminopropanol compound is used as an intermediate.
    Type: Application
    Filed: March 30, 2012
    Publication date: July 26, 2012
    Applicant: SCI PHARMTECH, INC.
    Inventors: Bo-Fong CHEN, Jinun-Ban YEH, Weichyun WONG
  • Optically active methylhydroxylaminopropanol compound and its use as intermediate for preparation of ()-(?)-3-methylamino-1-(2-thienyl)propan-1-ol
    Patent number: 8168805
    Abstract: The present invention provides an (S)-methylhydroxylaminopropanol derivative and the (S)-methylhydroxylaminopropanol derivative of the present invention is used as an intermediate for preparation of (S)-(?)-3-methylamino-1-(2-thienyl)propan-1-ol, which is an intermediate for preparation of (S)-(+)-N-methyl-3-methyl-3-(1-naphthyloxy)-3-(2-thienyl)propylamine oxalate. The present invention also provides a process for preparing (S)-(?)-3-methylamino-1-(2-thienyl)propan-1-ol with higher yield and lower cost, wherein the (S)-methylhydroxylaminopropanol derivative is used as an intermediate.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: May 1, 2012
    Assignee: SCI Pharmtech, Inc
    Inventors: Bo-Fong Chen, Jinun-Ban Yeh, Weichyun Wong
  • METHOD FOR PREPARING METAL SALT OF VALPROIC ACID
    Publication number: 20110040122
    Abstract: The present invention provides a simple, safe and more efficient process for preparing metal salts of valproic acid. The process includes steps of: (i) mixing valproic acid and a metal hydroxide (either dry solid or aqueous solution) in a drier to form a reaction mixture; and (ii) removing water, which is produced during the step of mixing the valproic acid and the metal hydroxide, from the reaction mixture to obtain the desired metal salts of valproic acid.
    Type: Application
    Filed: August 11, 2009
    Publication date: February 17, 2011
    Applicant: SCI PHARMTECH, INC.
    Inventors: Wen-Chih CHOU, Weichyun WONG, Yon-Lian WU
  • Methylhydroxylaminopropanol derivative and its use as intermediate for preparation of 3-methylamino-1-(2-thienyl)propan-1-OL
    Patent number: 7829731
    Abstract: The present invention provides a methylhydroxylaminopropanol derivative and the methylhydroxylaminopropanol derivative of the present invention is used as an intermediate for preparation of 3-methylamino-1-(2-thienyl)propan-1-ol, which is an intermediate for preparation of (+)-(S)—N-methyl-3-methyl-3-(1-naphthyloxy)-3-(2-thienyl)propylamine oxalate. The present invention also provides a process for preparing 3-methylamino-1-(2-thienyl)propan-1-ol with higher yield and lower cost, wherein the methylhydroxylaminopropanol derivative is used as an intermediate.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: November 9, 2010
    Assignee: SCI Pharmtech, Inc.
    Inventors: Bo-Fong Chen, Jinun-Ban Yeh, Weichyun Wong
  • OPTICALLY ACTIVE METHYLHYDROXYLAMINOPROPANOL DERIVATIVE AND ITS USE AS INTERMEDIATE FOR PREPARATION OF (S)-(-)-3-METHYLAMINO-1-(2-THIENYL)PROPAN-1-OL
    Publication number: 20090112001
    Abstract: The present invention provides an (S)-methylhydroxylaminopropanol derivative and the (S)-methylhydroxylaminopropanol derivative of the present invention is used as an intermediate for preparation of (S)-(?)-3-methylamino-1-(2-thienyl)propan-1-ol, which is an intermediate for preparation of (S)-(+)-N-methyl-3-methyl-3-(1-naphthyloxy)-3-(2-thienyl)propylamine oxalate. The present invention also provides a process for preparing (S)-(?)-3-methylamino-1-(2-thienyl)propan-1-ol with higher yield and lower cost, wherein the (S)-methylhydroxylaminopropanol derivative is used as an intermediate.
    Type: Application
    Filed: May 15, 2008
    Publication date: April 30, 2009
    Applicant: SCI Pharmtech, Inc.
    Inventors: Bo-Fong CHEN, Jinun-Ban YEH, Weichyun WONG
  • METHYLHYDROXYLAMINOPROPANOL DERIVATIVE AND ITS USE AS INTERMEDIATE FOR PREPARATION OF 3-METHYLAMINO-1-(2-THIENYL)PROPAN-1-OL
    Publication number: 20090112000
    Abstract: The present invention provides a methylhydroxylaminopropanol derivative and the methylhydroxylaminopropanol derivative of the present invention is used as an intermediate for preparation of 3-methylamino-1-(2-thienyl)propan-1-ol, which is an intermediate for preparation of (+)-(S)—N-methyl-3-methyl-3-(1-naphthyloxy)-3-(2-thienyl)propylamine oxalate. The present invention also provides a process for preparing 3-methylamino-1-(2-thienyl)propan-1-ol with higher yield and lower cost, wherein the methylhydroxylaminopropanol derivative is used as an intermediate.
    Type: Application
    Filed: October 29, 2007
    Publication date: April 30, 2009
    Applicant: SCI Pharmtech, Inc.
    Inventors: Bo-Fong Chen, Jinun-Ban Yeh, Weichyun Wong