Granted Patent
Utility
US 4,801,335 · App. 06/920,516
Rinsing in acid processing of substrates
Inventors:
Don C. Burkman, David D. Schumacher, Charlie A. Peterson
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Dec 12, 1986
Inventors
Don C. Burkman
David D. Schumacher
Charlie A. Peterson
Assignee (at issue)
FSI HOLDINGS, LLC
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.