Granted Patent
Utility
US 5,631,371 · App. 08/562,164
Method for the preparation of substituted 3-(phenylimino)-3H-phenothiazines and phenoxazines
Inventor:
Michael L. Bloczynski
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Nov 22, 1995
Inventor
Michael L. Bloczynski
Assignee (at issue)
Bayer 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.