Granted Patent
Utility
US 4,226,818 · App. 06/047,519
Production of polyvinylbutyral sheet rolls
Inventors:
Van Pelt Brower, Robert A. Esposito, Thomas E. Soar
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: Jun 8, 1979
Inventors
Van Pelt Brower
Robert A. Esposito
Thomas E. Soar
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.