Granted Patent
Utility
US 4,904,486 · App. 07/096,516
Animal feed blocks containing dietary supplements
Inventors:
Dennis Donovan, Michael McDonnell, Gerald C. Weigel, John E. Long
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Sep 11, 1987
Inventors
Dennis Donovan
Michael McDonnell
Gerald C. Weigel
John E. Long
Assignee (at issue)
ARCHER-DANIELS-MIDLAND 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.