Granted Patent
Utility
US 4,289,858 · App. 06/117,436
Polyol-fluorocarbon-aminetriol blend and polyisocyanurate foams therefore
Inventors:
Charles E. Koehler, Thomas R. McClellan, Pat L. Murray
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Feb 1, 1980
Inventors
Charles E. Koehler
Thomas R. McClellan
Pat L. Murray
Assignee (at issue)
The Upjohn Co.
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.