Patents by Inventor Jurg R. Pfister

Jurg R. Pfister 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).

  • Disubstituted xanthone carboxylic acid compounds
    Patent number: 3963752
    Abstract: Compositions containing and methods employing, as the essential ingredient, novel disubstituted xanthone carboxylic acid compounds which are useful in the treatment of allergic conditions. Methods for preparing these compounds and compositions and intermediates therein are also disclosed. 5-Methylsulfinyl-7-isopropoxyxanthone-2-carboxylic acid and 5,7-di(methylsulfinyl)xanthone-2-carboxylic acid are illustrated as representative compounds.
    Type: Grant
    Filed: March 13, 1975
    Date of Patent: June 15, 1976
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Jurg R. Pfister, Ian T. Harrison, John H. Fried
  • Disubstituted xanthone carboxylic acid compounds
    Patent number: 3963753
    Abstract: Compositions containing and methods employing, as the essential ingredient, novel disubstituted xanthone carboxylic acid compounds which are useful in the treatment of allergic conditions. Methods for preparing these compounds and compositions and intermediates therein are also disclosed. 5-Methyl-sulfinyl-7-isopropoxyxanthone-2-carboxylic acid and 5,7-di(methylsulfinyl)xanthone-2-carboxylic acid are illustrated as representative compounds.
    Type: Grant
    Filed: March 13, 1975
    Date of Patent: June 15, 1976
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Jurg R. Pfister, Ian T. Harrison, John H. Fried
  • Method of use of, and compositions containing, disubstituted xanthone carboxylic acid compounds
    Patent number: 3951618
    Abstract: Compositions containing and methods employing, as the essential ingredient, novel disubstituted xanthone carboxylic acid compounds which are useful in the treatment of allergic conditions. Methods for preparing these compounds and compositions and intermediates therein are also disclosed. 5-Methylthio-7-isopropoxyxanthone-2-carboxylic acid and 5,7-di-(methylthio)xanthone-2-carboxylic acid are illustrated as representative compounds.
    Type: Grant
    Filed: January 20, 1975
    Date of Patent: April 20, 1976
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Jurg R. Pfister, Ian T. Harrison, John H. Fried
  • Novel substituted xanthone carboxylic acid compounds
    Patent number: 3949084
    Abstract: Compositions containing and methods employing, as the essential ingredient, novel substituted xanthone carboxylic acid compounds which are useful in the treatment of allergic conditions. Methods for preparing these compounds and compositions and intermediates therein are also disclosed. 6-Acetylxanthone-2-carboxylic acid is illustrated as a representative compound.
    Type: Grant
    Filed: January 23, 1975
    Date of Patent: April 6, 1976
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Jurg R. Pfister, Ian T. Harrison, John H. Fried