Granted Patent
Utility
US 5,252,216 · App. 07/857,022
Protein purification
Inventors:
Gail Folena-Wasserman, John H. O'Grady, Thomas M. Smith, John Lifter
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Mar 24, 1992
Inventors
Gail Folena-Wasserman
John H. O'Grady
Thomas M. Smith
John Lifter
Assignee (at issue)
SmithKline Beecham Limited
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.