Patents by Inventor Timothy Yu-Wen Jen

Timothy Yu-Wen Jen 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).

  • .alpha.-AMINOALKYL-3-(1,2-DIHYDROXYETHYL)-4-HYDROXY-BENZYL ALCOHOLS HAVING .beta.-ADRENERGIC STIMULANT ACTIVITY
    Patent number: 4012528
    Abstract: .alpha.-Aminoalkyl-3-(1,2-dihydroxyethyl)-4-hydroxy-benzyl alcohols having .beta.-adrenergic stimulant activity, particularly as selective bronchodilators, are disclosed.
    Type: Grant
    Filed: June 13, 1975
    Date of Patent: March 15, 1977
    Assignee: SmithKline Corporation
    Inventors: Timothy Yu-Wen Jen, Carl Kaiser, Joe R. Wardell
  • Cephalosporin intermediates and process therefor
    Patent number: 3976641
    Abstract: Novel 7-oxocephalosporins and a process for preparing them are disclosed. These compounds are useful intermediates in the preparation of other cephalosporins which have antibacterial activity.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: August 24, 1976
    Assignee: SmithKline Corporation
    Inventors: John R. E. Hoover, Timothy Yu-Wen Jen
  • Mandelamidocephalosporins with improved properties
    Patent number: 3957985
    Abstract: 7-Mandelamido-3-(1-oxidopyridylthiomethyl)-3-cephem-4-carboxylic acid and substituted derivatives which have antibacterial activity are disclosed.
    Type: Grant
    Filed: February 25, 1975
    Date of Patent: May 18, 1976
    Assignee: SmithKline Corporation
    Inventors: James S. Frazee, Timothy Yu-Wen Jen
  • .alpha.-Amino methyl-5-hydroxy-2-pyridinemethanols
    Patent number: 3952101
    Abstract: .alpha.-Aminomethyl-5-hydroxy-2-pyridinemethanols having .beta.-adrenergic stimulant activity, particularly as selective bronchodilators, are prepared generally from a 2-pyridine-carboxaldehyde by reaction with an appropriate isocyanide, via an amide intermediate followed by reduction to an amine and finally catalytic hydrogenation to remove benzyl protective groups.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: April 20, 1976
    Assignee: SmithKline Corporation
    Inventors: Timothy Yu-Wen Jen, Carl Kaiser