Granted Patent
Utility
US 4,302,252 · App. 06/145,333
Solvent system for cellulose
Inventors:
Albin F. Turbak, Adel El-Kafrawy, Fred W. Snyder, Andrew Auerbach
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Apr 30, 1980
Inventors
Albin F. Turbak
Adel El-Kafrawy
Fred W. Snyder
Andrew Auerbach
Assignee (at issue)
International Telephone and Telegraph 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.