Granted Patent
Utility
US 5,328,828 · App. 07/916,568
Compositions and methods for determining the presence of amphetamines in a sample suspected of containing amphetamine and/or methamphetamine
Inventors:
Mae W. Hu, Cheng-I Lin, Chen-Jung Hsu, James Vincent Freeman, Marcel Pirio, Edwin F. Ullman
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Jul 20, 1992
Inventors
Mae W. Hu
Cheng-I Lin
Chen-Jung Hsu
James Vincent Freeman
Marcel Pirio
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.