Granted Patent
Utility
US 4,581,473 · App. 06/229,808
Preparation of ethylidene diacetate
Inventor:
Stanley W. Polichnowski
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Jan 30, 1981
Inventor
Stanley W. Polichnowski
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.