Granted Patent
Utility
US 5,668,080 · App. 08/759,805
Thermally-responsive record material
Inventors:
Michael Gerald Cove, Mary Ellen Schulz
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Dec 3, 1996
Inventors
Michael Gerald Cove
Mary Ellen Schulz
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.