Granted Patent
Utility
US 5,387,716 · App. 08/237,311
N4-substituted 1-alkoxy-2-acylamino-4-aminobenzenes, process for their preparation and their use
Inventors:
Willi Steckelberg, Peter Koch
Patented Case
View Patent ↗
Granted: Feb 7, 1995
Filed: May 3, 1994
Inventors
Willi Steckelberg
Peter Koch
Assignee (at issue)
Cassella Aktiengesellschaft
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.