Granted Patent
Utility
US 4,201,606 · App. 05/924,564
Refractory exothermic heating insulating articles
Inventor:
Frank Neat
Patented Case
View Patent ↗
Granted: May 6, 1980
Filed: Jul 14, 1978
Inventor
Frank Neat
Assignee (at issue)
Foseco Trading A.G.
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.