Granted Patent
Utility
US 4,542,170 · App. 06/693,074
Intumescent flame retarded polyurethane compositions
Inventors:
Dale R. Hall, Robert L. Jackson
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: Jan 22, 1985
Inventors
Dale R. Hall
Robert L. Jackson
Assignee (at issue)
B. F. Goodrich 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.