Granted Patent
Utility
US 4,299,916 · App. 06/106,620
Preferential signal production on a surface in immunoassays
Inventors:
David J. Litman, Edwin F. Ullman
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Dec 26, 1979
Inventors
David J. Litman
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.