Granted Patent
Utility
US 4,416,859 · App. 06/235,146
Countercurrent solids-fluid contactor
Inventors:
Lloyd Brown, Rudi Klasen
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Feb 17, 1981
Inventors
Lloyd Brown
Rudi Klasen
Assignee (at issue)
GA Technologies, Inc.
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.