Granted Patent
Utility
US 5,830,356 · App. 08/747,428
Hydraulic differential clarifier
Inventor:
Jeffrey C. Kauppila
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Nov 20, 1996
Inventor
Jeffrey C. Kauppila
Assignee (at issue)
Enviroquip 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.