Granted Patent
Utility
US 5,213,439 · App. 07/829,184
Process for marking a pavement
Inventor:
Noel Raymond Maurice De Keyzer
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Jan 31, 1992
Inventor
Noel Raymond Maurice De Keyzer
Assignee (at issue)
SHELL OIL 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.