Granted Patent
Utility
US 5,223,409 · App. 07/664,989
Directed evolution of novel binding proteins
Inventors:
Robert Charles Ladner, Sonia Guterman, Bruce Roberts, William Markland, Arthur C. Ley, Rachel Kent
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Mar 1, 1991
Inventors
Robert Charles Ladner
Sonia Guterman
Bruce Roberts
William Markland
Arthur C. Ley
Rachel Kent
Assignee (at issue)
Protein Engineering 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.