Patents by Inventor Guenther Lamm

Guenther Lamm 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).

  • Dyeing of surface coatings, organic solvents and petroleum products
    Patent number: 4285693
    Abstract: A process for dyeing surface coatings, organic solvents and petroleum products, wherein the dye used is a compound of the general formula I ##STR1## where R is C.sub.1 -C.sub.17 -alkyl, which may or may not be interrupted by oxygen and may or may not be substituted by hydroxyl or phenoxy, or is allyl,R.sup.1 is hydrogen or C.sub.1 -C.sub.8 -alkyl,R.sup.2 is C.sub.1 -C.sub.12 -alkyl which may or may not be interrupted by oxygen and may or may not be substituted by hydroxyl or phenoxy, or is C.sub.7 -C.sub.11 -aralkyl,X is hydrogen, chlorine, bromine, methyl or methoxy,Y is hydrogen, methyl or chlorine andR.sup.1 and R.sup.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: August 25, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Guenther Lamm, Johannes Dehnert