Granted Patent
Utility
US 5,306,830 · App. 07/994,073
Substituted 3-amino chromans
Inventors:
Bengt R. Andersson, Per A. E. Carlsson, Kjell A. I. Svensson, Hakan V. Wikstrom, Anders Hallberg
Patented Case
View Patent ↗
Granted: Apr 26, 1994
Filed: Dec 21, 1992
Inventors
Bengt R. Andersson
Per A. E. Carlsson
Kjell A. I. Svensson
Hakan V. Wikstrom
Anders Hallberg
Assignee (at issue)
The Upjohn Co.
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.