Granted Patent
Utility
US 5,155,265 · App. 07/687,098
Purification of acetic acid with ozone followed by treatment with activated carbon and/or an ion-exchange resin
Inventors:
Mark O. Scates, Russell K. Gibbs, Jr., G. Paull Torrence
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Apr 19, 1991
Inventors
Mark O. Scates
Russell K. Gibbs, Jr.
G. Paull Torrence
Assignee (at issue)
Hoechst Celanese 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.