Granted Patent
Utility
US 5,013,707 · App. 07/450,650
Pressure- or heat-sensitive recording material
Inventors:
Rox Phaff, Rudolf Zink
Patented Case
View Patent ↗
Granted: May 7, 1991
Filed: Dec 14, 1989
Inventors
Rox Phaff
Rudolf Zink
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.