Granted Patent
Utility
US 4,341,631 · App. 06/211,680
Ultrafiltration and reverse osmosis device comprising plural carbon tubes bonded together
Inventor:
Bartholomew Hargitay
Patented Case
View Patent ↗
Granted: Jul 27, 1982
Filed: Dec 1, 1980
Inventor
Bartholomew Hargitay
Assignee (at issue)
Union Carbide 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.