Granted Patent
Utility
US 4,161,515 · App. 05/751,838
Double receptor fluorescent immunoassay
Inventor:
Edwin F. Ullman
Patented Case
View Patent ↗
Granted: Jul 17, 1979
Filed: Dec 17, 1976
Inventor
Edwin F. Ullman
Assignee (at issue)
Syva 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.