Granted Patent
Utility
US 4,468,482 · App. 06/531,021
Flame retarded polyisocyanurate foam made from polyol derived from halogen containing dicarboxylic acid anhydride
Inventors:
Henry J. Barda, Burton J. Sutker, William J. Eldridge
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Sep 12, 1983
Inventors
Henry J. Barda
Burton J. Sutker
William J. Eldridge
Assignee (at issue)
Ethyl Corporation
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.