Granted Patent
Utility
US 4,388,997 · App. 06/255,358
Vent for paint cups
Inventor:
Thomas E. Grime
Patented Case
View Patent ↗
Granted: Jun 21, 1983
Filed: Apr 20, 1981
Inventor
Thomas E. Grime
Assignee (at issue)
Champion Spark Plug Company
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.