Granted Patent
Utility
US 5,221,708 · App. 07/740,745
Use of recovered polyvinyl butyral in the manufacture of flooring
Inventor:
Adolf A. Klaiber
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Aug 6, 1991
Inventor
Adolf A. Klaiber
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.