Granted Patent
Utility
US 6,218,439 · App. 09/456,145
Method of manufacturing methanol
Inventors:
Kazuto Kobayashi, Hideaki Nagai, Hiroyuki Osora, Yoshio Seiki, Tetsuya Imai
Patented Case
View Patent ↗
Granted: Apr 17, 2001
Filed: Dec 7, 1999
Inventors
Kazuto Kobayashi
Hideaki Nagai
Hiroyuki Osora
Yoshio Seiki
Tetsuya Imai
Assignee (at issue)
MITSUBISHI ELECTRIC 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.