Granted Patent
Utility
US 4,289,753 · App. 05/784,188
Calculus-inhibiting method and compositions
Inventors:
David R. Dyroff, Gary F. Graf, Keun Young Kim, Walton F. Suchanek, Jr.
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Apr 4, 1977
Inventors
David R. Dyroff
Gary F. Graf
Keun Young Kim
Walton F. Suchanek, Jr.
Assignee (at issue)
Monsanto Company
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.