Granted Patent
Utility
US 4,247,435 · App. 05/947,681
Intumescent fire retardant coating compositions
Inventor:
Nelson H. Kasten
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Oct 2, 1978
Inventor
Nelson H. Kasten
Assignee (at issue)
Monsanto 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.