Granted Patent
Utility
US 5,139,607 · App. 07/690,110
Alkaline stripping compositions
Inventors:
Irl E. Ward, Francis W. Michelotti
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Apr 23, 1991
Inventors
Irl E. Ward
Francis W. Michelotti
Assignee (at issue)
ACT 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.