Granted Patent
Utility
US 4,910,059 · App. 06/892,679
Tapered roofing membrane
Inventor:
Erol Sancaktar
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Aug 1, 1986
Inventor
Erol Sancaktar
Assignee (at issue)
The Kendall Company LP
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.