Granted Patent
Utility
US 5,869,710 · App. 08/690,321
Polygdroxyalkylamidobetaines
Inventor:
Bernd Papenfuhs
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Jul 25, 1996
Inventor
Bernd Papenfuhs
Assignee (at issue)
Hoechst GmbH
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.