Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2004-02-19
2008-10-28
Maples, John S (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S010000
Reexamination Certificate
active
07442454
ABSTRACT:
A fuel cell is protected from performance degradation and damage by determining when an ion exchange resin filter needs replacement before the occurrence of an increase in the electric conductivity of water used in the fuel cell system. The replacement time of the ion exchange resin filter11is judged by an ion-exchange capacity judging part152on the basis of the result of comparing a reference electric conductivity as preset with the electric conductivity of coolant water circulating in a coolant water cycle as measured by an electric conductivity meter12a predetermined time after a coolant water pump14starts operation.
REFERENCES:
patent: 5058032 (1991-10-01), Farrell et al.
patent: 6216092 (2001-04-01), Kong
patent: 6709779 (2004-03-01), Uozumi
patent: 7052790 (2006-05-01), Nakamura et al.
patent: 2002/0164511 (2002-11-01), Uozumi
patent: 2004/0028963 (2004-02-01), Kormann et al.
patent: 5-315002 (1993-11-01), None
patent: 09-231990 (1997-09-01), None
patent: 9-231990 (1997-09-01), None
patent: 2000-208157 (2000-07-01), None
patent: 2001-035519 (2001-02-01), None
patent: 2002-141095 (2002-05-01), None
patent: 2002-216817 (2002-08-01), None
patent: 2002-313377 (2002-10-01), None
patent: 2003-031251 (2003-01-01), None
patent: 2003-036869 (2003-02-01), None
patent: WO 02/063707 (2002-08-01), None
Final Decision of Rejection for Japanese Application 2003-054275, Jan. 22, 2008, Japanese Patent Office.
Foley & Lardner LLP
Maples John S
Nissan Motor Co,. Ltd.
LandOfFree
Fuel cell system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuel cell system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel cell system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4005644