Granted Patent
Utility
US 5,041,655 · App. 07/241,116
Method of preparing 1,6-di(N.sup.3 -cyano-N.sup.1 -guanidino) hexane
Inventors:
Klaus Huthmacher, Axel Kleemann, Horst Bethge, Rolf Braun
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Sep 6, 1988
Inventors
Klaus Huthmacher
Axel Kleemann
Horst Bethge
Rolf Braun
Assignee (at issue)
Degussa AG
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.