Granted Patent
Utility
US 4,871,248 · App. 07/084,271
Method of particle size determination
Inventor:
Richard L. Hoffman
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Aug 11, 1987
Inventor
Richard L. Hoffman
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.