Granted Patent
Utility
US 5,663,453 · App. 08/373,910
Dioxolane derivatives
Inventor:
Friedrich Karrer
Patented Case
View Patent ↗
Granted: Sep 2, 1997
Filed: Jan 17, 1995
Inventor
Friedrich Karrer
Assignee (at issue)
Ciba-Geiby Corporation
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.