Granted Patent
Utility
US 6,047,564 · App. 09/029,684
Method of producing quartz glass bodies
Inventors:
Hartwig Schaper, Klaus Ruppert
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Mar 3, 1998
Inventors
Hartwig Schaper
Klaus Ruppert
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.