Granted Patent
Utility
US 6,171,680 · App. 09/100,688
Composite sheathing material having high water vapor permeability
Inventor:
Mohamed A. H. Fahmy
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Jun 19, 1998
Inventor
Mohamed A. H. Fahmy
Assignee (at issue)
K-2 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.