Granted Patent
Utility
US 4,128,642 · App. 05/752,596
Method of promoting growth and improving feed efficiency of animals
Inventors:
Richard E. Ivy, Robert D. Williams
Patented Case
View Patent ↗
Granted: Dec 5, 1978
Filed: Dec 20, 1976
Inventors
Richard E. Ivy
Robert D. Williams
Assignee (at issue)
International Minerals & Chemical Corp.
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.