Granted Patent
Utility
US 5,411,084 · App. 08/258,696
Sand filter system for use in a well
Inventor:
James B. Padden
Patented Case
View Patent ↗
Granted: May 2, 1995
Filed: Jun 13, 1994
Inventor
James B. Padden
Assignee (at issue)
Purolator Products NA, 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.