Granted Patent
Utility
US 4,668,535 · App. 06/646,677
Process for preparing a fuel tank of polyurethane laminate having contiguous contrasting layers
Inventors:
Paul E. Liggett, David L. Braun
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Sep 4, 1984
Inventors
Paul E. Liggett
David L. Braun
Assignee (at issue)
Goodyear Aerospace Corporation
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.