Granted Patent
Utility
US 4,332,623 · App. 06/090,133
Adsorption separation method and apparatus thereof
Inventors:
Masao Ando, Tetsuya Hirota, Katashi Shioda
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Nov 1, 1979
Inventors
Masao Ando
Tetsuya Hirota
Katashi Shioda
Assignee (at issue)
Mitsubishi Chemical Industries, 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.