Granted Patent
Utility
US 4,624,912 · App. 06/698,952
Thermally transferable layers of radiation sensitive epoxy resins used to prepare protective coatings and relief images
Inventors:
Hans Zweifel, Sigrid Bauer, Kurt Meier
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Feb 6, 1985
Inventors
Hans Zweifel
Sigrid Bauer
Kurt Meier
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.