Granted Patent
Utility
US 4,421,825 · App. 06/487,711
Paperboard coated to minimize browning
Inventors:
George M. Seiter, Curtis H. Broz
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: May 2, 1983
Inventors
George M. Seiter
Curtis H. Broz
Assignee (at issue)
Champion International Corporation Limited
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.