Granted Patent
Utility
US 4,486,246 · App. 06/561,980
Polyoxazolines in aqueous quenchants
Inventor:
Joseph F. Warchol
Patented Case
View Patent ↗
Granted: Dec 4, 1984
Filed: Dec 16, 1983
Inventor
Joseph F. Warchol
Assignee (at issue)
E. F. Houghton & 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.