Granted Patent
Utility
US 4,220,451 · App. 06/005,875
Process for the determination of serum inorganic phosphate
Inventor:
John A. Stefanchik
Patented Case
View Patent ↗
Granted: Sep 2, 1980
Filed: Jan 23, 1979
Inventor
John A. Stefanchik
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.