Granted Patent
Utility
US 4,744,990 · App. 06/911,688
Hydantoins as animal food supplements
Inventors:
Robert Wright Bragdon, Roger R. Gaudette
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Sep 25, 1986
Inventors
Robert Wright Bragdon
Roger R. Gaudette
Assignee (at issue)
W. R. Grace & Co.
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.