Granted Patent
Utility
US 5,182,183 · App. 07/789,550
Positive photosensitive planographic printing plates containing specific high-molecular weight compound and photosensitive ester of O-napthoquinonediazidosulfonic acid with polyhydroxybenzophenone
Inventors:
Hiroshi Tomiyasu, Yoshiko Kobayashi, Kiyoshi Goto, Takeshi Yamamoto, Hideyuki Nakai
Patented Case
View Patent ↗
Granted: Jan 26, 1993
Filed: Nov 8, 1991
Inventors
Hiroshi Tomiyasu
Yoshiko Kobayashi
Kiyoshi Goto
Takeshi Yamamoto
Hideyuki Nakai
Assignees (at issue)
Mitsubishi Kasei Corporation
Konica Corporation
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.