Granted Patent
Utility
US 4,948,513 · App. 07/199,984
Method for controlling overspray in paint spray booths
Inventor:
David B. Mitchell
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: May 27, 1988
Inventor
David B. Mitchell
Assignee (at issue)
W.R. Grace & Co. Conn.
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.