Patents by Inventor Michael Heullmann

Michael Heullmann 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).

  • Cycloalkylidene derivatives and fragrance composition
    Patent number: 5073538
    Abstract: Cycloalkylidene derivatives of the general formulae Ia to Ic ##STR1## where the dashed line is a possible additional chemical bond, the radicals R.sup.1 are identical or different C.sub.1 -C.sub.4 -alkenyl groups, R.sup.2 and R.sup.3 are each methyl or ethyl, R.sup.4 is hydrogen or one of the radicals R.sup.1, X is oxygen, methylene or a chemical bond, m is from 0 to 3 or, when X is methylene, is from 1 to 3, or, when X is methylene and R.sup.1 is methyl, is from 2 to 3 and n is from 0 to 3, are used as fragrance materials.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: December 17, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Heullmann, Rainer Becker, Lothar Janitschke, Gerald Lauterbach, Wolfgang Barth, Klaas Jansen