Granted Patent
Utility
US 4,900,845 · App. 07/147,992
Moiety for selective separation
Inventors:
Brian J. Brisdon, Richard England, Sera Saheb Abed-Ali
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Jan 25, 1988
Inventors
Brian J. Brisdon
Richard England
Sera Saheb Abed-Ali
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.