Granted Patent
Utility
US 4,332,786 · App. 06/150,022
Method and composition for vitamin B-12 Assay
Inventors:
Michael D. Cabelli, Ernest V. Groman
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: May 15, 1980
Inventors
Michael D. Cabelli
Ernest V. Groman
Assignee (at issue)
Baxter Travenol Laboratories, 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.