Granted Patent
Utility
US 4,839,253 · App. 07/091,328
Photosensitive and electrodepositable phenolic resin with quinone diazide sulfonyloxy group
Inventors:
Christopher G. Demmer, Edward Irving
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Aug 28, 1987
Inventors
Christopher G. Demmer
Edward Irving
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.