Granted Patent
Utility
US 4,684,739 · App. 06/326,417
Alkylenedioxybenzene derivatives and acid addition salts thereof
Inventors:
Ryoji Kikumoto, Harukazu Fukami, Kenichiro Nakao, Mamoru Sugano
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Dec 1, 1981
Inventors
Ryoji Kikumoto
Harukazu Fukami
Kenichiro Nakao
Mamoru Sugano
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.