Granted Patent
Utility
US 4,895,827 · App. 07/298,447
Thermally-responsive record material
Inventors:
Steven L. Vervacke, Kenneth D. Glanz
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Jan 17, 1989
Inventors
Steven L. Vervacke
Kenneth D. Glanz
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.