Granted Patent
Utility
US 6,027,648 · App. 08/201,740
Method of resolving a mixture of optical isomers
Inventors:
Jun Haginaka, Hiroo Wada, Hiroya Fujima, Toshinobu Miwa
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Feb 25, 1994
Inventors
Jun Haginaka
Hiroo Wada
Hiroya Fujima
Toshinobu Miwa
Assignees (at issue)
Shinwa Chemical Industries Ltd.
Eisai 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.