Granted Patent
Utility
US 6,575,309 · App. 09/743,740
Filter for fluids
Inventor:
Antonio Chiga
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Jan 10, 2001
Inventor
Antonio Chiga
Assignee (at issue)
Filtertek 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.