Granted Patent
Utility
US 4,477,396 · App. 06/328,890
Countercurrent flow absorber and desorber
Inventor:
William H. Wilkinson
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Dec 9, 1981
Inventor
William H. Wilkinson
Assignee (at issue)
Battelle Development Corporation
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.