Granted Patent
Utility
US 4,963,684 · App. 07/307,247
Process for preparing cotarnine
Inventors:
Yoshiharu Morita, Naoshi Imaki, Tadashi Shirasaka, Tetsuro Shimpuku
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: Feb 7, 1989
Inventors
Yoshiharu Morita
Naoshi Imaki
Tadashi Shirasaka
Tetsuro Shimpuku
Assignee (at issue)
Mitsubishi Kasei Corporation
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.