Granted Patent
Utility
US 4,902,464 · App. 07/280,808
Cross-linked polyvinyl butyral
Inventors:
George E. Cartier, Peter H. Farmer
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Dec 7, 1988
Inventors
George E. Cartier
Peter H. Farmer
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.