Granted Patent
Utility
US 4,247,660 · App. 05/948,858
Photo-crosslinkable polymers having azidophthalimidyl side groups
Inventors:
Hans Zweifel, Vratislav Kvita, Joseph Berger
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Oct 5, 1978
Inventors
Hans Zweifel
Vratislav Kvita
Joseph Berger
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.