Granted Patent
Utility
US 4,981,961 · App. 07/404,917
Synthetic affinity ligand compositions and methods for purification and recovery of organic molecules
Inventor:
That T. Ngo
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Sep 8, 1989
Inventor
That T. Ngo
Assignee (at issue)
BioProbe International, 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.