Granted Patent
Utility
US 5,128,264 · App. 07/565,959
Process for preparing optically active 3-hydroxybutane derivatives using lipase
Inventor:
Charles J. Sih
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Aug 13, 1990
Inventor
Charles J. Sih
Assignee (at issue)
SUNTORY HOLDINGS 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.