Fuel cell stack
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 6, 2018
Issued Date -
N/A
app pub date -
Mar 25, 2014
filing date -
Mar 29, 2013
priority date (Note) -
In Force
status (Latency Note)
![]() |
A preliminary load of PAIR data current through [] has been loaded. Any more recent PAIR data will be loaded within twenty-four hours. |
PAIR data current through []
A preliminary load of cached data will be loaded soon.
Any more recent PAIR data will be loaded within twenty-four hours.
![]() |
Next PAIR Update Scheduled on [ ] |

Importance

US Family Size
|
Non-US Coverage
|
Patent Longevity
|
Forward Citations
|
Abstract
A fuel cell stack (1) includes a plurality of stacked power generation cells (3), a heat exchange unit (7) provided between adjacent two of the power generation cells, a fuel gas supply path arranged to supply the power generation cells with a fuel gas, and an oxidant gas supply path (3, 7, 33, 34, 38) arranged to supply the power generation cells with an oxidant gas, wherein the fuel gas supply path includes in series a first path (7, 31) passing through the heat exchange unit (7), a second path (3, 32, 35, 37) passing through some of the plurality of power generation cells (3) in parallel, and a third path (3, 32, 36) passing through the other power generation cells in parallel.
First Claim
all claims..Other Claims data not available
Family
Country | kind | publication No. | Filing Date | Type | Sub-Type |
---|---|---|---|---|---|
JP | B2 | JP5981379 | Mar 29, 2013 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 燃料電池 | Aug 31, 2016 | |||
KR | B1 | KR101710230 | Mar 21, 2014 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PATENT SPECIFICATION | 연료 전지 | Feb 24, 2017 | |||
CA | C | CA2847319 | Mar 24, 2014 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PATENT (SECOND LEVEL) | FUEL CELL STACK | Sep 08, 2020 |
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
NGK SPARK PLUG CO LTD | NAGOYA PREFECTURE AICHI PREFECTURE JAPAN NAGOYA CITY AICHI |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Hotta, Nobuyuki | Konan, JP | 42 | 263 |
# of filed Patents : 42 Total Citations : 263 | |||
Morikawa, Tetsuya | Ichinomiya, JP | 12 | 43 |
# of filed Patents : 12 Total Citations : 43 | |||
Shichida, Takafumi | Aichi, JP | 15 | 44 |
# of filed Patents : 15 Total Citations : 44 | |||
Tsuga, Shunsuke | Aichi, JP | 6 | 20 |
# of filed Patents : 6 Total Citations : 20 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 0 Citation Count
- H01M Class
- 0 % this patent is cited more than
- 7 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 6, 2025 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 6, 2029 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Jan 06, 2025 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Nov 04, 2020 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4 |
May 16, 2017 | I | Issuance | |
Apr 26, 2017 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Feb 11, 2016 | P | Published | |
Aug 31, 2015 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ONOE, SHINSUKE;REEL/FRAME:036676/0346 Owner name: HITACHI CONSUMER ELECTRONICS CO., LTD., JAPAN Effective Date: Aug 31, 2015 |
Apr 08, 2013 | F | Filing |

Matter Detail

Renewals Detail
