Granted Patent
Utility
US 5,648,529 · App. 08/442,044
Process for the recovery of an organic acid from the manufacture of a cellulose ester
Inventors:
Stephen Jones, Denis G. Fallon
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: May 16, 1995
Inventors
Stephen Jones
Denis G. Fallon
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.