Granted Patent
Utility
US 4,786,539 · App. 07/015,289
Thermal insulating composite laminate
Inventor:
Paul Grether
Patented Case
View Patent ↗
Granted: Nov 22, 1988
Filed: Feb 17, 1987
Inventor
Paul Grether
Assignee (at issue)
Geilinger AG
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.