Granted Patent
Utility
US 5,248,440 · App. 07/828,257
Paint spray booth treatment of waterborne coatings
Inventors:
David B. Mitchell, Thomas Peter Curran
Patented Case
View Patent ↗
Granted: Sep 28, 1993
Filed: Jan 30, 1992
Inventors
David B. Mitchell
Thomas Peter Curran
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.