Granted Patent
Utility
US 4,454,295 · App. 06/517,166
Cured cellulose ester, method of curing same, and use thereof
Inventors:
Joseph Wittmann, John M. Evans
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Jul 25, 1983
Inventors
Joseph Wittmann
John M. Evans
Assignee (at issue)
UCO Optics, 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.