Granted Patent
Utility
US 4,716,161 · App. 06/719,456
Phenylpiperazine derivatives and their acid addition salts
Inventors:
Harukazu Fukami, Ryoji Kikumoto, Kenichiro Nakao, Issei Nitta, Shinya Inoue
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Apr 3, 1985
Inventors
Harukazu Fukami
Ryoji Kikumoto
Kenichiro Nakao
Issei Nitta
Shinya Inoue
Assignee (at issue)
Mitsubishi Chemical Industries, 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.