Granted Patent
Utility
US 5,095,042 · App. 07/749,170
Method for making rigid polyisocyanurate foam
Inventors:
Sammie Joe Glorioso, John Nigel BROOM
Patented Case
View Patent ↗
Granted: Mar 10, 1992
Filed: Aug 23, 1991
Inventors
Sammie Joe Glorioso
John Nigel BROOM
Assignee (at issue)
Apache Building Products Company
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.