Patents by Inventor Joachim Schantl

Joachim Schantl 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).

  • Schistosomicidal acridanone hydrazones
    Patent number: 4544659
    Abstract: Acridanone derivatives of the formula ##STR1## wherein the dotted line is an optional bond, R.sup.1 is hydrogen, halogen or nitro, R.sup.2 is hydrogen or lower alkyl, one of the substituents R.sup.3 and R.sup.4 is hydrogen or lower alkyl and the other together with R is an additional bond and R.sup.5 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl or lower alkyl substituted by halogen or lower alkoxy,and pharmaceutically acceptable acid addition salts thereof, processes for their preparation and pharmaceutical compositions based thereon, are described. The compounds of formula I are useful as schistosomicidal agents.
    Type: Grant
    Filed: November 15, 1983
    Date of Patent: October 1, 1985
    Assignee: Hoffman-La Roche Inc.
    Inventors: Urs Brombacher, Marc Montavon, Hermann Bretschneider, Joachim Schantl, Wolfgang Turk