Granted Patent
Utility
US 4,852,219 · App. 07/055,888
Formation of mineral fibre flakes and use of these flakes to reconstitute insulating mats
Inventors:
Yves Demars, Francois Szalata, Christian DeCoopman
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Jun 1, 1987
Inventors
Yves Demars
Francois Szalata
Christian DeCoopman
Assignee (at issue)
Isover Saint-Gobain
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.