Granted Patent
Utility
US 4,765,844 · App. 06/920,665
Solvents for photoresist removal
Inventors:
Hans-Joachim Merrem, Axel Schmitt
Patented Case
View Patent ↗
Granted: Aug 23, 1988
Filed: Oct 20, 1986
Inventors
Hans-Joachim Merrem
Axel Schmitt
Assignee (at issue)
Hoechst 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.