Granted Patent
Utility
US 4,456,521 · App. 06/486,468
Three layer laminate
Inventors:
Frank Solomon, Charles Grun
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Apr 19, 1983
Inventors
Frank Solomon
Charles Grun
Assignee (at issue)
Diamond Shamrock 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.