Granted Patent
Utility
US 5,681,973 · App. 08/502,261
Microporous heteropolyoxometallates and method of their production and use as catalysts
Inventors:
Wolfgang Hoelderich, Markus Hoelscher, Goetz-Peter Schindler, Ulli Englert, Bodo ZIBROWIUS, Dietrich Arntz
Patented Case
View Patent ↗
Granted: Oct 28, 1997
Filed: Jul 13, 1995
Inventors
Wolfgang Hoelderich
Markus Hoelscher
Goetz-Peter Schindler
Ulli Englert
Bodo ZIBROWIUS
Dietrich Arntz
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.