Granted Patent
Utility
US 5,554,421 · App. 08/480,319
Insulating multiple layer sealed units and insulating spacer and assembly
Inventors:
France Delisle, James Boudreault
Patented Case
View Patent ↗
Granted: Sep 10, 1996
Filed: Jun 7, 1995
Inventors
France Delisle
James Boudreault
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.