US3481789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst body and gas diffusion electrode and fuel cell therewith
Assignee: Siemens AG
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Filing: 1965-10-12
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Granted: 1969-12-02
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Expires: 1985-10-12
Abstract
No abstract record available.
Inventors
- 👤 August Winsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:30
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/0215; B01J37/0221; B01J25/00; B01J25/02; B01J35/00; B01J35/60; B01J37/0009; B01J37/0018; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F3/1109; H; H01; H01M; H01M4/00; H01M4/86; H01M4/8605; H01M4/8621; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A FUEL CELL COMPRISING AN ELECTROLYTE AND TWO ECECTRODES, AT LEAST ONE ELECTRODE COMPRISING AN ELECTRICALLY-CONDUCTIVE, SELF-SUSTAINING SINTERED SKELETON COMPOSED OF A MATERIAL FREE OF CATALYTIC ACTIVITY AND HAVING AN INTERSTITIAL NETWORK OF FINE PORES WHICH ARE FREE OF CATALYTIC COATING AND WHICH ARE CAPABLE OF CARRYING THE ELECTROLYTE, SAID FINE PORES COMMUNICATING WITH COARSER PORES WHICH ARE DISTRIBUTED THROUGHOUT THE SKELETON AND WHICH ARE CAPABLE OF CARRYING THE REACTION GAS, AND A CATALYST COATING, SAID CATALYTIC COATING BEING CONCENTRATED ON THE SURFACES OF THOSE PARTICLES OF THE SKELETON WHICH DEFINE THE LARGER PORES.
Claim 2
Dependent Claim
94 words
A FUEL CELL COMPRISING AN ELECTROLYTE AND TWO ECECTRODES, AT LEAST ONE ELECTRODE COMPRISING AN ELECTRICALLY-CONDUCTIVE, SELF-SUSTAINING SINTERED SKELETON COMPOSED OF A MATERIAL FREE OF CATALYTIC ACTIVITY AND HAVING AN INTERSTITIAL NETWORK OF FINE PORES WHICH ARE FREE OF CATALYTIC COATING AND WHICH ARE CAPABLE OF CARRYING THE ELECTROLYTE, SAID FINE PORES COMMUNICATING WITH COARSER PORES WHICH ARE DISTRIBUTED THROUGHOUT THE SKELETON AND WHICH ARE CAPABLE OF CARRYING THE REACTION GAS, AND A CATALYST COATING, SAID CATALYTIC COATING BEING CONCENTRATED ON THE SURFACES OF THOSE PARTICLES OF THE SKELETON WHICH DEFINE THE LARGER PORES.
Claim 3
Dependent Claim
73 words
A CATALYTIC BODY WHICH COMPRISES AN ELECTRICALLY-CONDUCTIVE, SELF-SUSTAINING, SINTERED SKELETON COMPOSED OF A MATERIAL FREE OF CATALYTIC ACTIVITY COMPRISING AN INTERSTITIAL NETWORK OF FINE PORES WHICH ARE FREE OF CATALYTIC COATING AND WHICH ARE IN COMMUNICATION WITH COARSER PORES DISTRIBUTED THROUGHOUT THE SKELETON, AND A CATALYTIC COATING FORMING THE BOUNDARIES WITH THE LARGER PORES, SAID CATALYTIC COATING BEING CONCENTRATED ON THE SURFACE OF THOSE PARTICLES OF THE SKELETON WHICH DEFINE THE LARGER PORES.
Claim 4
Dependent Claim
73 words
A CATALYTIC BODY WHICH COMPRISES AN ELECTRICALLY-CONDUCTIVE, SELF-SUSTAINING, SINTERED SKELETON COMPOSED OF A MATERIAL FREE OF CATALYTIC ACTIVITY COMPRISING AN INTERSTITIAL NETWORK OF FINE PORES WHICH ARE FREE OF CATALYTIC COATING AND WHICH ARE IN COMMUNICATION WITH COARSER PORES DISTRIBUTED THROUGHOUT THE SKELETON, AND A CATALYTIC COATING FORMING THE BOUNDARIES WITH THE LARGER PORES, SAID CATALYTIC COATING BEING CONCENTRATED ON THE SURFACE OF THOSE PARTICLES OF THE SKELETON WHICH DEFINE THE LARGER PORES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |