Granted Patent
Utility
US 5,138,093 · App. 06/654,662
Process for preparing ethylidene diacetate
Inventors:
Nabil Rizkalla, Charles N. Winnick
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Feb 5, 1976
Inventors
Nabil Rizkalla
Charles N. Winnick
Assignee (at issue)
EASTMAN KODAK 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.