Granted Patent
Utility
US 6,593,270 · App. 09/187,420
Moldings based on pyrogenic silicon dioxide
Inventors:
Helmfried Krause, Hermanus Gerhardus Jozef Lansink Rotgerink, Oliver Feuer, Thomas Tacke, Peter Panster
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Nov 6, 1998
Inventors
Helmfried Krause
Hermanus Gerhardus Jozef Lansink Rotgerink
Oliver Feuer
Thomas Tacke
Peter Panster
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.