Granted Patent
Utility
US 5,300,380 · App. 07/947,899
Process for the production of relief structures using a negative photoresist based on polyphenols and epoxy compounds or vinyl ethers
Inventors:
Martin Roth, Kurt Meier
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Sep 17, 1992
Inventors
Martin Roth
Kurt Meier
Assignee (at issue)
Ciba-Geigy
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.