Granted Patent
Utility
US 4,933,257 · App. 07/408,956
Positive quinone diazide photo-resist composition with antistatic agent
Inventors:
Konoe Miura, Tameichi Ochiai, Yasuhiro Kameyama, Tooru Koyama, Takashi Okabe, Tomoharu Mametani
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Sep 18, 1989
Inventors
Konoe Miura
Tameichi Ochiai
Yasuhiro Kameyama
Tooru Koyama
Takashi Okabe
Tomoharu Mametani
Assignees (at issue)
MITSUBISHI ELECTRIC CORPORATION
Mitsubishi Chemical Industries, Ltd.
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.