Granted Patent
Utility
US 4,528,790 · App. 06/513,495
Roof insulation system
Inventors:
Shao-Kuei Lo, Steven D. Crothers
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Jul 13, 1983
Inventors
Shao-Kuei Lo
Steven D. Crothers
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.