Granted Patent
Utility
US 6,790,307 · App. 10/055,864
Shingles with multiple blend drops and method of depositing granules onto a moving substrate
Inventor:
Bert W. Elliott
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Jan 22, 2002
Inventor
Bert W. Elliott
Assignee (at issue)
Owens-Corning Fiberglas Technology, 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.