Granted Patent
Utility
US 4,609,575 · App. 06/626,640
Method of apparatus for applying chemicals to substrates in an acid processing system
Inventor:
Don C. Burkman
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Jul 2, 1984
Inventor
Don C. Burkman
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.