Granted Patent
Utility
US 5,618,863 · App. 08/621,856
UV stable polyvinyl butyral sheet
Inventors:
John Joseph D'Errico, Mary S. Krach
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Mar 25, 1996
Inventors
John Joseph D'Errico
Mary S. Krach
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.