Granted Patent
Utility
US 4,778,617 · App. 07/049,763
Acid cleaner composition
Inventors:
Elias H. Shaer, Anthony R. Zembrodt
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: May 12, 1987
Inventors
Elias H. Shaer
Anthony R. Zembrodt
Assignee (at issue)
The Drackett Company
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.