Granted Patent
Utility
US 4,613,598 · App. 06/708,641
Piperazine derivatives and their acid addition salts
Inventors:
Harukazu Fukami, Shinya Inoue, Issei Nitta, Kenichiro Nakao, Ryoji Kikumoto
Patented Case
View Patent ↗
Granted: Sep 23, 1986
Filed: Mar 6, 1985
Inventors
Harukazu Fukami
Shinya Inoue
Issei Nitta
Kenichiro Nakao
Ryoji Kikumoto
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.