Granted Patent
Utility
US 5,646,330 · App. 08/390,255
Production of enantiomerically enriched ortho-substituted .alpha.,.alpha.-diaromatic methanols
Inventors:
Wen-Chung Shieh, William R. Cantrell, Jr., John A. Carlson
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Feb 17, 1995
Inventors
Wen-Chung Shieh
William R. Cantrell, Jr.
John A. Carlson
Assignee (at issue)
Ciba-Geigy
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.