Granted Patent
Utility
US 4,859,563 · App. 07/023,689
Positive photoresist composition
Inventors:
Konoe Miura, Tameichi Ochiai, Yasuhiro Kameyama
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Mar 9, 1987
Inventors
Konoe Miura
Tameichi Ochiai
Yasuhiro Kameyama
Assignee (at issue)
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.