Granted Patent
Utility
US 4,165,294 · App. 05/908,189
Phenol-free and chlorinated hydrocarbon-free photoresist stripper comprising surfactant and hydrotropic aromatic sulfonic acids
Inventor:
John E. Vander Mey
Patented Case
View Patent ↗
Granted: Aug 21, 1979
Filed: May 22, 1978
Inventor
John E. Vander Mey
Assignee (at issue)
Allied Chemical 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.