Granted Patent
Utility
US 4,806,311 · App. 06/770,076
Multizone analytical element having labeled reagent concentration zone
Inventor:
Alfred Greenquist
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Aug 28, 1985
Inventor
Alfred Greenquist
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.