Granted Patent
Utility
US 4,399,259 · App. 06/304,521
Photocrosslinkable polymers with side groups derived from indenone and the preparation and use of these polymers
Inventors:
Hans Zweifel, Joseph Berger, Hans Bosshard
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Sep 21, 1981
Inventors
Hans Zweifel
Joseph Berger
Hans Bosshard
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.