IP Library Granted Patent US 6,477,323
Granted Patent Utility
US 6,477,323 · App. 09/049,895

System and method for continuously reprocessing waste sulfuric acid liquid, and heater supporting structure for heating a vessel made of glass

Inventors: Kiyohito Koizumi, Hiroshi Osuda, Toru Matoba, Masataka Fukuizumi, Takayuki Sadakata
Patented Case View Patent ↗
Granted: Nov 5, 2002 Filed: Mar 30, 1998
Inventors
Kiyohito Koizumi
Hiroshi Osuda
Toru Matoba
Masataka Fukuizumi
Takayuki Sadakata
Assignee (at issue)
Asahi Techno Glass Corporation

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.

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Quick Facts
Patent No.
US 6,477,323
App. No.
09/049,895
Filed
1998-03-30
Granted
2002-11-05
Kind
B2