Granted Patent
Utility
US 4,182,633 · App. 05/862,163
Process of the operation of a simulated moving bed
Inventors:
Hachiro Ishikawa, Hidekatu Tanabe, Keizo Usui
Patented Case
View Patent ↗
Granted: Jan 8, 1980
Filed: Dec 19, 1977
Inventors
Hachiro Ishikawa
Hidekatu Tanabe
Keizo Usui
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.