Granted Patent
Utility
US 6,361,851 · App. 09/406,492
Composite roofing shingle
Inventors:
Frederick W. Sieling, William R. Carroll
Patented Case
View Patent ↗
Granted: Mar 26, 2002
Filed: Sep 27, 1999
Inventors
Frederick W. Sieling
William R. Carroll
Assignee (at issue)
BUILDING MATERIALS INVESTMENT 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.