Granted Patent
Utility
US 4,575,540 · App. 06/684,765
Polyvinyl butyral sheet roughness control
Inventor:
George E. Cartier
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Dec 21, 1984
Inventor
George E. Cartier
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.