Granted Patent
Utility
US 4,620,970 · App. 06/676,849
Method for generation of oxygen gas
Inventors:
Takeo Suzumori, Jun Kokubu, Minoru Kubota
Patented Case
View Patent ↗
Granted: Nov 4, 1986
Filed: Nov 30, 1984
Inventors
Takeo Suzumori
Jun Kokubu
Minoru Kubota
Assignee (at issue)
MITSUBISHI GAS CHEMICAL COMPANY, INC.
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.