Granted Patent
Utility
US 5,137,673 · App. 07/121,555
Process for forming plasticized polyvinyl butyral sheet
Inventors:
David Paul Bourcier, Robert A. Esposito
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Nov 17, 1987
Inventors
David Paul Bourcier
Robert A. Esposito
Assignee (at issue)
Monsanto 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.