Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Involving measuring – analyzing – or testing
Reexamination Certificate
2004-09-24
2009-08-25
Ryan, Patrick (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Involving measuring, analyzing, or testing
C205S084000, C205S147000, C205S641000, C205S645000
Reexamination Certificate
active
07578920
ABSTRACT:
An electrolytic processing apparatus can detect the end point of electrolytic processing stably with high precision and with a relatively simple construction. The electrolytic processing apparatus includes: a processing electrode which can come close to or into contact with a processing object; a feeding electrode for feeding electricity to the processing object; a fluid supply section for supplying fluid between the processing object and at least one of the processing electrode and the feeding electrode; a processing power source for applying a voltage between the processing electrode and the feeding electrode; a drive section for causing relative movement between the processing object and at least one of the processing electrode and the feeding electrode; and an eddy current sensor for detecting the thickness of the processing object from a change in eddy current loss. The sensor is disposed not in contact with (or separately) by an insulator from the processing electrode and/or the feeding electrode.
REFERENCES:
patent: 5911619 (1999-06-01), Uzoh et al.
patent: 7022216 (2006-04-01), Taylor et al.
patent: 2001/0035354 (2001-11-01), Ashjaee et al.
patent: 2002/0047705 (2002-04-01), Tada et al.
patent: 03/098676 (2003-11-01), None
Hirokawa Kazuto
Iizumi Takeshi
Kobata Itsuki
Noji Ikutaro
Yasuda Hozumi
Ebara Corporation
Leader William T
Ryan Patrick
Wenderoth , Lind & Ponack, L.L.P.
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