Granted Patent
Utility
US 6,485,643 · App. 09/805,757
Modular base for a filter cartridge and method of manufacturing therefor
Inventor:
Stephen Vardion
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Mar 13, 2001
Inventor
Stephen Vardion
Assignee (at issue)
Stanadyne LLC
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.