Granted Patent
Utility
US 5,156,953 · App. 07/333,160
Simultaneous calibration heterogeneous immunoassay
Inventors:
David J. Litman, Edwin F. Ullman
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Apr 4, 1989
Inventors
David J. Litman
Edwin F. Ullman
Assignee (at issue)
Syntex (U.S.A.) LLC
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.