Granted Patent
Utility
US 5,476,948 · App. 08/325,780
Preparation of 5-acetoacetylamino-2-benzimidazolone
Inventors:
Karl E. Mack, Michael Bohusch
Patented Case
View Patent ↗
Granted: Dec 19, 1995
Filed: Oct 19, 1994
Inventors
Karl E. Mack
Michael Bohusch
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.