Granted Patent
Utility
US 4,280,911 · App. 06/161,151
Method for treating water
Inventors:
Daniel Durda, John T. Quigley
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Jun 19, 1980
Inventors
Daniel Durda
John T. Quigley
Assignee (at issue)
Aeration Industries, 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.