Granted Patent
Utility
US 4,542,159 · App. 06/039,436
Cycloaliphatic ketoamines
Inventors:
Jurgen Engel, Axel Kleemann, Klaus Posselt, Fritz Stroman, Klaus Thiemer
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: May 15, 1979
Inventors
Jurgen Engel
Axel Kleemann
Klaus Posselt
Fritz Stroman
Klaus Thiemer
Assignee (at issue)
Degussa Akteinsellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.