Granted Patent
Utility
US 5,997,658 · App. 09/004,937
Aqueous stripping and cleaning compositions
Inventors:
Darryl Peters, Irl E. Ward, Francis W. Michelotti, Floyd Riddle
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Jan 9, 1998
Inventors
Darryl Peters
Irl E. Ward
Francis W. Michelotti
Floyd Riddle
Assignee (at issue)
Ashland, Inc.
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.