Granted Patent
Utility
US 4,762,767 · App. 06/857,663
Negatively operating photoresist composition, with radiation-absorbing additives
Inventors:
Gunther Haas, Karl-Heinz Neisius
Patented Case
View Patent ↗
Granted: Aug 9, 1988
Filed: Apr 30, 1986
Inventors
Gunther Haas
Karl-Heinz Neisius
Assignee (at issue)
Merck Patent GmbH
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.