Granted Patent
Utility
US 4,742,010 · App. 06/866,821
Assay method for the determination of lithium with novel substituted crown dyes
Inventors:
Cheng-I Lin, Marcel Pirio
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: May 23, 1986
Inventors
Cheng-I Lin
Marcel Pirio
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.