Granted Patent
Utility
US 5,300,439 · App. 07/919,250
Method, device, and composition for the assay of ions
Inventor:
Steven C. Charlton
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Jul 27, 1992
Inventor
Steven C. Charlton
Assignee (at issue)
Miles Inc.
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.