Granted Patent
Utility
US 5,952,528 · App. 09/145,667
Process for enhancing the optical purity
Inventors:
Cheng-Yi Chen, Edward J. J. Grabowski, Paul J. Reider, Lushi Tan, Richard D. Tillyer
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Sep 2, 1998
Inventors
Cheng-Yi Chen
Edward J. J. Grabowski
Paul J. Reider
Lushi Tan
Richard D. Tillyer
Assignee (at issue)
MERCK & CO., 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.