Granted Patent
Utility
US 4,902,603 · App. 07/104,697
Photoresist compositions containing selected 6-acetoxy cyclohexadienone photosensitizers and novolak resins
Inventors:
Sydney George Slater, Stanley A. Ficner
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Oct 5, 1987
Inventors
Sydney George Slater
Stanley A. Ficner
Assignee (at issue)
Olin 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.