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.