Granted Patent
Utility
US 4,333,839 · App. 06/210,478
Filter system with improved blowdown collection and recirculation means
Inventors:
Richard E. Cardoza, William D. Crowe
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Nov 26, 1980
Inventors
Richard E. Cardoza
William D. Crowe
Assignee (at issue)
J.R. Schneider Co., 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.