Granted Patent
Utility
US 4,490,516 · App. 06/554,216
Cellulosic organic solvent soluble products
Inventor:
Frank Verbanac
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Nov 22, 1983
Inventor
Frank Verbanac
Assignee (at issue)
A.E. Staley Manufacturing 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.