Granted Patent
Utility
US 4,284,674 · App. 06/092,624
Thermal insulation
Inventor:
Nicholas Sheptak
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Nov 8, 1979
Inventor
Nicholas Sheptak
Assignee (at issue)
American Can 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.