Granted Patent
Utility
US 4,278,440 · App. 06/118,215
Reagent and method for direct determination of chloride in serum
Inventors:
Wai Tak Law, Gerhard Ertingshausen
Patented Case
View Patent ↗
Granted: Jul 14, 1981
Filed: Feb 4, 1980
Inventors
Wai Tak Law
Gerhard Ertingshausen
Assignee (at issue)
Union Carbide Corporation
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.