Patents by Inventor Kevin Q. Fang

Kevin Q. Fang 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).

  • Formoterol process
    Patent number: 6268533
    Abstract: A method is disclosed for the preparation of optically pure isomers of formoterol by the reaction of an optically pure 4-benzyloxy-3-formamidostyrene oxide with an optically pure 4-methoxy-&agr;-methyl-N-(phenylmethyl)benzeneethanamine followed by debenzylation. Useful intermediates in the process are also disclosed, as are the novel L-tartrate salt of R,R-formoterol and pharmaceutical compositions thereof.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: July 31, 2001
    Assignee: Sepracor Inc.
    Inventors: Yun Gao, Robert Hett, Kevin Q. Fang, Stephen A. Wald, Chris Hugh Senanayake
  • Formoterol process
    Patent number: 6040344
    Abstract: A method is disclosed for the preparation of optically pure isomers of formoterol by the reaction of an optically pure 4-benzyloxy-3-formamidostyrene oxide with an optically pure 4-methoxy-.alpha.-methyl-N-(phenylmethyl)benzeneethanamine followed by debenzylation. Useful intermediates in the process are also disclosed, as are the novel L-tartrate salt of R,R-formoterol and pharmaceutical compositions thereof.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: March 21, 2000
    Assignee: Sepracor Inc.
    Inventors: Yun Gao, Robert Hett, Kevin Q. Fang, Stephen A. Wald, Martin P. Redmon, Chris Hugh Senanayake