Granted Patent
Utility
US 4,935,339 · App. 06/731,470
Delayed solid phase immunologic assay
Inventor:
Richard J. Zahradnik
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: May 7, 1985
Inventor
Richard J. Zahradnik
Assignee (at issue)
Nichols Institute Diagnostics
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.