Granted Patent
Utility
US 4,733,971 · App. 06/833,904
Programmable weight sensitive microingredient feed additive delivery system and method
Inventor:
William C. Pratt
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Feb 26, 1986
Inventor
William C. Pratt
Assignee (at issue)
Micro Chemical, Inc.
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.