Granted Patent
Utility
US 5,116,715 · App. 07/668,810
Photosensitive compositions containing aromatic fused polycyclic sulfonic acid and partial ester of phenolic resin with diazoquinonesulfonic acid or diazoquinonecarboxylic acid
Inventors:
Bruno Roland, Jan Vandendriessche, Catherine Jakus
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Mar 8, 1991
Inventors
Bruno Roland
Jan Vandendriessche
Catherine Jakus
Assignee (at issue)
UCB S.A.
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.