Granted Patent
Utility
US 6,673,396 · App. 10/045,339
Method for producing an SiO2 blank by adjusting shape of deposition burner flame
Inventor:
Heinz Fabian
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Nov 7, 2001
Inventor
Heinz Fabian
Assignee (at issue)
HERAEUS QUARZGLAS GMBH & CO. KG
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.