Granted Patent
Utility
US 6,284,118 · App. 09/568,173
Electrostatic filter for dielectric fluid
Inventor:
Donald Eric Thompson
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: May 9, 2000
Inventor
Donald Eric Thompson
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.