Granted Patent
Utility
US 5,275,909 · App. 07/891,011
Positive-working radiation sensitive mixtures and articles containing alkali-soluble binder, o-quinonediazide photoactive compound and BLANKOPHOR FBW acting dye
Inventors:
Tripunithura V. Jayaraman, David Brzozowy
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Jun 1, 1992
Inventors
Tripunithura V. Jayaraman
David Brzozowy
Assignee (at issue)
OCG Microelectronic Materials, Inc.
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.