Granted Patent
Utility
US 6,485,982 · App. 08/465,675
Test device and method for colored particle immunoassay
Inventor:
David Charlton
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Jun 6, 1995
Inventor
David Charlton
Assignee (at issue)
Armkel LLC
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.