Granted Patent
Utility
US 4,629,559 · App. 06/743,847
Vertical looped reactor tank with delayed air release feature
Inventor:
George W. Smith
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Jun 12, 1985
Inventor
George W. Smith
Assignee (at issue)
Envirex, 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.