Granted Patent
Utility
US 4,438,207 · App. 06/254,022
Radioimmunoassay for cannabinoids
Inventors:
Kenneth E. Fahrenholtz, John E. Heveran
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Apr 13, 1981
Inventors
Kenneth E. Fahrenholtz
John E. Heveran
Assignee (at issue)
HOFFMANN-LA ROCHE INC.
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.