Patents by Inventor Marius Bugglin

Marius Bugglin 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).

  • Process for the preparation of 3,7-dialkylxanthines
    Patent number: 5210192
    Abstract: The invention is directed to a process for preparing 3,7-dialkylxanthines of the formula I ##STR1## (R.sup.1 and R.sup.2 denote C.sub.1 -C.sub.4 -alkyl) by the reaction of 4-amino-imidazolecarboxamide-(5) of the formula II ##STR2## with an alkali cyanate in aqueous solution at a pH of from 3 to 5 followed by cyclization of the resulting urea derivative at a pH of from 8 to 14.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: May 11, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Marius Bugglin, Herbert Gropp, Lothar Janitschke, Ulrich Karl, Hans-Heinrich Lenz