Granted Patent
Utility
US 4,329,228 · App. 06/237,209
Filter plate for horizontal plate filter
Inventors:
William D. Crowe, Darrell Snell
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: Feb 23, 1981
Inventors
William D. Crowe
Darrell Snell
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.