Granted Patent
Utility
US 5,737,897 · App. 08/831,259
Insulation board composite
Inventor:
Michael P. Naipawer, III
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Apr 7, 1997
Inventor
Michael P. Naipawer, III
Assignee (at issue)
Building Materials Corporation of America
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.