Granted Patent
Utility
US 5,821,196 · App. 08/835,701
Thermally-responsive record material
Inventors:
Mary Ellen Schulz, Michael Gerald Cove
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Apr 10, 1997
Inventors
Mary Ellen Schulz
Michael Gerald Cove
Assignee (at issue)
Appleton Papers Inc.
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.