Granted Patent
Utility
US 6,271,374 · App. 09/013,266
Stable crystalline (6S)- and (6R)-tetrahydrofolic acid
Inventors:
Hans Muller, Martin Ulmann, Rudolf Moser, Thomas Ammann
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Jan 26, 1998
Inventors
Hans Muller
Martin Ulmann
Rudolf Moser
Thomas Ammann
Assignee (at issue)
EPROVA AG
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.