Granted Patent
Utility
US 4,576,903 · App. 06/685,085
Developer for positive photoresists
Inventors:
Winfried Baron, Kurt Marquard, Hans-Joachim Merrem, Raimund Sindlinger, Klaus P. Thiel
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Dec 21, 1984
Inventors
Winfried Baron
Kurt Marquard
Hans-Joachim Merrem
Raimund Sindlinger
Klaus P. Thiel
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.