Granted Patent
Utility
US 4,650,741 · App. 06/788,882
Positive photosensitive composition of cocondensed .beta.-naphthol and m-cresol with aldehyde in admixture with sulfonyl triester of a 1,2-naphthoquinone-1-diazide
Inventors:
Konoe Miura, Hideki Nagasaka, Noriaki Takahashi, Tameichi Ochiai, Ryuichiro Takasaki
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Oct 18, 1985
Inventors
Konoe Miura
Hideki Nagasaka
Noriaki Takahashi
Tameichi Ochiai
Ryuichiro Takasaki
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.