Granted Patent
Utility
US 4,820,526 · App. 07/082,256
Method of improving feathering in birds
Inventors:
Sebastian M. Laurent, Robert N. Sanders
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Aug 6, 1987
Inventors
Sebastian M. Laurent
Robert N. Sanders
Assignee (at issue)
Ethyl Corporation
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.