Granted Patent
Utility
US 4,480,079 · App. 06/438,348
Copolymerization of unsaturated urethane monomers
Inventors:
Michael L. Orton, William I. Spurr
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Nov 1, 1982
Inventors
Michael L. Orton
William I. Spurr
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.