Stainless steel, titanium, or titanium alloy solid polymer...

Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C429S006000, C429S010000

Reexamination Certificate

active

07807281

ABSTRACT:
The present invention releases a method of producing a metal separator for a solid polymer fuel cell by stainless steel, titanium, or titanium alloy during which securing lower cost and mass producibility by using a material having a high workability to form a complicated shape by a high productivity, then using an inexpensive blast process to drive a conductive substance into the surface of the metal separator member, that is, provides a stainless steel, titanium, or titanium alloy solid polymer fuel cell separator comprised of stainless steel, titanium, or titanium alloy in the surface of which a low ion release conductive substance is buried, having an arithmetic mean roughness (Ra) of the separator surface of 0.5 to 5.0 μm, having a 10-point mean roughness (Rz) of 3 to 20 μm, having an average spacing of surface relief shapes (Sm) of 300 μm or less, having values of a warp rate and twist rate of a separator of 0.1 or less, and having a contact resistance value with respect to carbon paper of 15 mΩcm2or less at a surface pressure of 1 MPa.

REFERENCES:
patent: 2003/0224236 (2003-12-01), Morita et al.
patent: 2005/0089742 (2005-04-01), Ishigami et al.
patent: 10-228914 (1998-08-01), None
patent: 11-121018 (1999-04-01), None
patent: 11-126621 (1999-05-01), None
patent: 11-126622 (1999-05-01), None
patent: 11-219713 (1999-08-01), None
patent: 11-260383 (1999-09-01), None
patent: 2000-21419 (2000-01-01), None
patent: 2000-256808 (2000-09-01), None
patent: 2000-260439 (2000-09-01), None
patent: 2000-309854 (2000-11-01), None
patent: 2001-006713 (2001-01-01), None
patent: 2001-32056 (2001-02-01), None
patent: 2001-089870 (2001-04-01), None
patent: 2001-250565 (2001-09-01), None
patent: 2001-357862 (2001-12-01), None
patent: 2002-025586 (2002-01-01), None
patent: 2002-075401 (2002-03-01), None
patent: 2002-190305 (2002-07-01), None
patent: 2002-313354 (2002-10-01), None
patent: 2003-123783 (2003-04-01), None
patent: 2003-160884 (2003-06-01), None
patent: 2003-193206 (2003-07-01), None
patent: 2003-223904 (2003-08-01), None
patent: 2004-002960 (2004-01-01), None
patent: 2004-076124 (2004-03-01), None
patent: 2004-107704 (2004-04-01), None
patent: 2004-124197 (2004-04-01), None
patent: 2004-156132 (2004-06-01), None
patent: 2004-220908 (2004-08-01), None
patent: 2004-232074 (2004-08-01), None
patent: 2004-265855 (2004-09-01), None
patent: 2004-269969 (2004-09-01), None
patent: 2004-273370 (2004-09-01), None
patent: 2004-306128 (2004-11-01), None
patent: WO 2005/047567 (2005-05-01), None
patent: 2006-040608 (2006-02-01), None
patent: 2006-140095 (2006-06-01), None
patent: WO 01/28018 (2001-04-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Stainless steel, titanium, or titanium alloy solid polymer... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stainless steel, titanium, or titanium alloy solid polymer..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stainless steel, titanium, or titanium alloy solid polymer... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4236443

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.