Granted Patent
Utility
US 6,425,270 · App. 09/582,956
Rod in tube method of forming a fiber preform, with maintaining a gas supply until after an end is stretched
Inventors:
Masanori Suzuki, Toshiyuki Kato, Atsuhi Shimada, Yutaka Watabe
Patented Case
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Granted: Jul 30, 2002
Filed: Jul 7, 2000
Inventors
Masanori Suzuki
Toshiyuki Kato
Atsuhi Shimada
Yutaka Watabe
Assignees (at issue)
HERAEUS QUARZGLAS GMBH & CO. KG
SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
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.