Granted Patent
Utility
US 4,367,247 · App. 06/234,906
Primer for portland cement concrete
Inventor:
Denis W. Akerberg
Patented Case
View Patent ↗
Granted: Jan 4, 1983
Filed: Feb 17, 1981
Inventor
Denis W. Akerberg
Assignee (at issue)
The Quaker Oats 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.