Granted Patent
Utility
US 4,758,299 · App. 06/880,695
Method of making composite foam structural laminate
Inventor:
Donald D. Burke
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: Jul 1, 1986
Inventor
Donald D. Burke
Assignee (at issue)
The Roll-o-Matic Chain Company
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.