Patents by Inventor Wolfgang Forth

Wolfgang Forth 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).

  • 5-aminosalicylic acid-O-sulfates of physiologically acceptable bases, process for the preparation thereof and drugs containing same
    Patent number: 4837229
    Abstract: 5-Aminosalicylic acid O-sulfates of physiologically acceptable bases are new substances which are preparable by esterification of 5-nitrosalicylic acid alkyl esters with carbodiimide and sulfuric acid, alkaline saponification of the alkyl ester group and reduction of the thus obtained 5-nitrosalicylic acid O-sulfates. Said substances are useful as drugs, more specifically for the treatment of colitis ulcerosa, enteritis regionalis Crohn (morbus Crohn), chronic nonspecific colitis and diverticulitis.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: June 6, 1989
    Assignee: Henning Berlin GmbH Chemie- und Pharmawerk
    Inventors: Hartmut Rokos, Heinz Konczak, Wolfgang Forth