Granted Patent
Utility
US 4,627,207 · App. 06/311,697
Fastener for securing roofing material to cementitious roof decks having removable tab
Inventors:
Kenneth E. Young, Robert T. Frohlich, Hubert T. Dudley, Robert L. Hallock
Patented Case
View Patent ↗
Granted: Dec 9, 1986
Filed: Oct 15, 1981
Inventors
Kenneth E. Young
Robert T. Frohlich
Hubert T. Dudley
Robert L. Hallock
Assignees (at issue)
W. R. Grace & Co.
ES Products
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.