Granted Patent
Utility
US 6,649,048 · App. 09/990,564
Filter cartridge with regulated surface cleaning mechanism
Inventors:
Scott A. de Ridder, James H. Lenhart, Jr.
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Nov 20, 2001
Inventors
Scott A. de Ridder
James H. Lenhart, Jr.
Assignee (at issue)
Stormwater Management
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.