Granted Patent
Utility
US 6,830,781 · App. 10/045,441
Method for producing an SiO2 blank and apparatus for performing said method
Inventor:
Heinz Fabian
Patented Case
View Patent ↗
Granted: Dec 14, 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.