Granted Patent
Utility
US 5,594,142 · App. 08/389,310
Process for the preparation of polyalkyl-1-oxa-diazaspirodecane compounds
Inventors:
Karl Gaa, G unter Nowy, Georg Schmailzl
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Feb 16, 1995
Inventors
Karl Gaa
G unter Nowy
Georg Schmailzl
Assignee (at issue)
Hoechst 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.