Granted Patent
Utility
US 5,817,659 · App. 08/744,952
Stable crystalline tetrahydrofolic acid salts
Inventors:
Hans Muller, Martin Ulmann, Rudolf Moser, Thomas Ammann
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Nov 7, 1996
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.