Granted Patent
Utility
US 5,611,549 · App. 08/579,593
Gasket structure with tapered bolt area densification
Inventor:
John S. Forry
Patented Case
View Patent ↗
Granted: Mar 18, 1997
Filed: Dec 26, 1995
Inventor
John S. Forry
Assignee (at issue)
ARMSTRONG WORLD 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.