Granted Patent
Utility
US 4,447,421 · App. 06/482,271
Process for the preparation of medicated animal feed supplement
Inventor:
Irving Klothen
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Apr 8, 1983
Inventor
Irving Klothen
Assignee (at issue)
American Cyanamid 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.