Granted Patent
Utility
US 4,555,447 · App. 06/639,178
Blowing wool insulation
Inventors:
Ronald F. Sieloff, William A. Kays
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Aug 9, 1984
Inventors
Ronald F. Sieloff
William A. Kays
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.