Granted Patent
Utility
US 4,405,455 · App. 06/337,522
Adsorption separation apparatus
Inventors:
Masao Ando, Tetsuya Hirota, Katashi Shioda
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Jan 6, 1982
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.