Granted Patent
Utility
US 6,476,723 · App. 08/692,567
Insulating oil leak containment
Inventors:
David C. Campbell, David McMahan Butler, Johnny James Clark
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Aug 6, 1996
Inventors
David C. Campbell
David McMahan Butler
Johnny James Clark
Assignee (at issue)
Filmax, 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.