Granted Patent
Utility
US 5,216,151 · App. 07/800,259
Process for producing benzylphthalazinone derivatives and salts thereof
Inventor:
Kazukata Murakami
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Nov 29, 1991
Inventor
Kazukata Murakami
Assignee (at issue)
Eisai Chemical Co., Ltd.
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.