Granted Patent
Utility
US 4,871,552 · App. 07/174,651
Hydantoins as animal food supplements
Inventors:
Robert Wright Bragdon, Roger R. Gaudette
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Mar 29, 1988
Inventors
Robert Wright Bragdon
Roger R. Gaudette
Assignee (at issue)
W.R. Grace & Co. Conn.
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.