Granted Patent
Utility
US 4,355,823 · App. 06/171,635
Pressure-sensitive or heat-sensitive recording material
Inventor:
Peter Burri
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Jul 24, 1980
Inventor
Peter Burri
Assignee (at issue)
Ciba-Geigy
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.