Granted Patent
Utility
US 5,817,870 · App. 08/897,139
Process for the production of malonic acid or a salt thereof
Inventors:
Thomas Haas, Martin Meier, Christoph Brossmer, Dietrich Arntz, Andreas Freund
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Jul 21, 1997
Inventors
Thomas Haas
Martin Meier
Christoph Brossmer
Dietrich Arntz
Andreas Freund
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.