Patents by Inventor Haydn R. Williams

Haydn R. Williams 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).

  • Leukotriene antagonists
    Patent number: 5017583
    Abstract: Compounds of the Formula I: ##STR1## and pharmaceutically acceptable salts thereof are leukotriene antagonists. These compounds inhibit SRS-A and leukotriene synthesis and are antagonists of SRS-A and are thus useful in the treatment of asthma, allergic disorders, inflammation, skin diseases and certain cardiovascular disorders.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: May 21, 1991
    Assignee: Merck Frosst Canada, Inc.
    Inventors: Robert N. Young, Joshua Rokach, Haydn R. Williams, Masatoshi Kakushima, Yvan Guindon
  • 4-oxo-benzopyran carboxylic acids
    Patent number: 4609744
    Abstract: Compounds of the Formula I: ##STR1## and pharmaceutically acceptable salts thereof are leukotriene antagonists. These compounds inhibit SRS-A and leukotriene synthesis and are antagonists of SRS-A and are thus useful in the treatment of asthma, allergic disorders, inflammation, skin diseases and certain cardiovascular disorders.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: September 2, 1986
    Assignee: Merck Frosst Canada Inc.
    Inventors: Robert N. Young, Joshua Rokach, Haydn R. Williams, Masatoshi Kakushima, Yvan Guindon