Granted Patent
Utility
US 6,231,646 · App. 09/266,504
Paint overspray exhaust air filter
Inventors:
Rand Schweizer, James W. Motter
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Mar 11, 1999
Inventors
Rand Schweizer
James W. Motter
Assignee (at issue)
Chemco Manufacturing Company, 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.