Granted Patent
Utility
US 5,721,016 · App. 08/650,347
Process for the treatment of mineral building materials
Inventors:
Peter Panster, Thomas Goebel, Stefan Wieland, Marion Langen, Klaus Zinsmeister, Ute Werner, Christian Brandes
Patented Case
View Patent ↗
Granted: Feb 24, 1998
Filed: May 20, 1996
Inventors
Peter Panster
Thomas Goebel
Stefan Wieland
Marion Langen
Klaus Zinsmeister
Ute Werner
Christian Brandes
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.