Granted Patent
Utility
US 6,008,409 · App. 08/999,000
Method for obtaining 2-hydroxy-4-methylthiobutyric acid (MHA) which is stable in storage
Inventors:
Hans-Albrechl Hasseberg, Hans Joachim Hasselbach, Klaus Huthmacher, Volker Hafner, Harald Heinzel, Axel Ronneburg
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Dec 29, 1997
Inventors
Hans-Albrechl Hasseberg
Hans Joachim Hasselbach
Klaus Huthmacher
Volker Hafner
Harald Heinzel
Axel Ronneburg
Assignee (at issue)
Degussa 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.