Granted Patent
Utility
US 4,548,752 · App. 06/535,252
Chemical compositions and methods
Inventor:
William J. Pentz
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Nov 14, 1983
Inventor
William J. Pentz
Assignee (at issue)
QO Chemicals, 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.