Granted Patent
Utility
US 5,819,496 · App. 08/848,571
Containing insulation using a barrier assembly that includes a substantially air impermeable layer
Inventor:
Henry Sperber
Patented Case
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Granted: Oct 13, 1998
Filed: Apr 28, 1997
Inventor
Henry Sperber
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.