Granted Patent
Utility
US 4,619,796 · App. 06/623,260
Process for preparation of porous carbon plates
Inventors:
Yasuhira Awata, Osamu Iwaki
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Jun 21, 1984
Inventors
Yasuhira Awata
Osamu Iwaki
Assignee (at issue)
Oji Paper Co., 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.