Granted Patent
Utility
US 6,653,485 · App. 09/991,261
Ortho substituted chiral phosphines and phosphinites and their use in asymmetric catalytic reactions
Inventor:
Xumu Zhang
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Nov 16, 2001
Inventor
Xumu Zhang
Assignee (at issue)
THE PENN STATE RESEARCH FOUNDATION
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.