Granted Patent
Utility
US 4,424,090 · App. 06/428,109
Insulating material and method of making material
Inventor:
James C. Kyle
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Sep 29, 1982
Inventor
James C. Kyle
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.