Granted Patent
Utility
US 4,393,082 · App. 05/812,797
Ion exchange materials to increase consumption of non-protein nitrogen by ruminants
Inventors:
Joe L. White, Alvin J. Ohlrogge
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Jul 5, 1977
Inventors
Joe L. White
Alvin J. Ohlrogge
Assignee (at issue)
PURDUE RESEARCH FOUNDATION
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.