Granted Patent
Utility
US 4,484,941 · App. 06/360,999
Tetrahydrophthalimides, and their production and use as herbicides
Inventors:
Eiki Nagano, Shunichi Hashimoto, Ryo Yoshida, Hiroshi Matsumoto, Katsuzo Kamoshita
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Mar 23, 1982
Inventors
Eiki Nagano
Shunichi Hashimoto
Ryo Yoshida
Hiroshi Matsumoto
Katsuzo Kamoshita
Assignee (at issue)
SUMITOMO CHEMICAL COMPANY, LIMITED
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.