Granted Patent
Utility
US 4,120,983 · App. 05/615,629
Hydroxypropylated, epichlorohydrin crosslinked tapioca and corn starch derivatives
Inventors:
Frank del Valle, John V. Tuschhoff, Charles E. Streaty, Jr.
Patented Case
View Patent ↗
Granted: Oct 17, 1978
Filed: Sep 22, 1975
Inventors
Frank del Valle
John V. Tuschhoff
Charles E. Streaty, Jr.
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.