Granted Patent
Utility
US 4,879,121 · App. 06/934,460
Zeolites in poultry feeding
Inventors:
Sebastian M. Laurent, Robert N. Sanders
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Nov 24, 1986
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.