Granted Patent
Utility
US 6,624,327 · App. 10/048,876
Process for preparing betaines
Inventors:
Christian Blaufelder, Reinhard Broucek, Axel Carstens, Ludwig Eisenhuth
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: May 2, 2002
Inventors
Christian Blaufelder
Reinhard Broucek
Axel Carstens
Ludwig Eisenhuth
Assignee (at issue)
AKZO NOBEL N.V.
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.