Granted Patent
Utility
US 4,536,779 · App. 06/557,013
Heat-sensitive recording material
Inventors:
Hermann Nachbur, Christel Tempel
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Dec 1, 1983
Inventors
Hermann Nachbur
Christel Tempel
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.