Granted Patent
Utility
US 4,401,474 · App. 06/262,285
Pyrolytic coating reactant for defect and durability control
Inventor:
Harold E. Donley
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: May 11, 1981
Inventor
Harold E. Donley
Assignee (at issue)
PPG Industries, 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.