Granted Patent
Utility
US 6,140,536 · App. 09/091,796
Process for obtaining 2-hydroxy-4-methylthiobutyric acid (MHA)
Inventors:
Hans-Albrecht Hasseberg, Hans Joachim Hasselbach, Klaus Huthmacher, Volker Hafner, Harald Heinzel, Barbara Jäger
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Sep 1, 1998
Inventors
Hans-Albrecht Hasseberg
Hans Joachim Hasselbach
Klaus Huthmacher
Volker Hafner
Harald Heinzel
Barbara Jäger
Assignee (at issue)
Degussa-Huels 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.