Granted Patent
Utility
US 4,578,253 · App. 06/575,600
Methods of and apparatus for recovering a constituent of a process effluent
Inventors:
Roger Gill, Pundi L. Narasimham
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: Jan 31, 1984
Inventors
Roger Gill
Pundi L. Narasimham
Assignee (at issue)
AT&T Technologies Incorporated
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.