Granted Patent
Utility
US 4,435,472 · App. 06/412,329
Adherent, acid cured resin protective coatings for concrete and steel
Inventor:
George R. Leah
Patented Case
View Patent ↗
Granted: Mar 6, 1984
Filed: Aug 27, 1982
Inventor
George R. Leah
Assignee (at issue)
Pennwalt Corporation
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.