Granted Patent
Utility
US 4,000,128 · App. 05/520,690
Thin-thick retort starch derivatives
Inventors:
Frank del Valle, John V. Tuschoff, Charles E. Streaty, Jr.
Patented Case
View Patent ↗
Granted: Dec 28, 1976
Filed: Nov 4, 1974
Inventors
Frank del Valle
John V. Tuschoff
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.