Granted Patent
Utility
US 6,045,706 · App. 09/136,858
Calcium hypochlorite feeder
Inventors:
Ralph E. Morrison, Michael Liebendorfer, Richard W. Dennis, II, Joseph Tietjens, Roy Martin
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Aug 19, 1998
Inventors
Ralph E. Morrison
Michael Liebendorfer
Richard W. Dennis, II
Joseph Tietjens
Roy Martin
Assignee (at issue)
U.S. Filter/Stranco
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.