Granted Patent
Utility
US 5,175,347 · App. 07/801,658
Process for preparing cis-dihydronopol
Inventors:
Walter Heitmann, Uwe Maetzel
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: Dec 2, 1991
Inventors
Walter Heitmann
Uwe Maetzel
Assignee (at issue)
Kali-Chemie Pharma GmbH
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.