Granted Patent
Utility
US 5,658,459 · App. 08/580,812
Dual velocity strainer
Inventor:
Berwin A. Guttormsen
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Dec 29, 1995
Inventor
Berwin A. Guttormsen
Assignee (at issue)
United States Filter Corporation
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.