Patent US4647359A successfully refreshed from Google Patents.
US4647359A
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Electrocatalytic gas diffusion electrode employing thin carbon cloth layer
Assignee: WALTER JUDA AND/OR WALTER JUDA ASSOCIATES
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Filing: 1985-10-16
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Granted: 1987-03-03
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Expires: 2005-10-16
Abstract
Abstract An improved electrocatalytic gas diffusion electrode comprising an open pore carbon cloth carrying on one side a first uniform mixture of noble-metal-catalyzed carbon and a hydrophobic binder adhered within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth, and a second uniform mixture of non-catalytic carbon and a hydrophobic binder adhered to the remaining open pore portion on the other side of said cloth; and method of preparation.
Inventors
- 👤 Robert W. Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:38
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; C; C25; C25B; C25B11/00; C25B11/02; C25B11/03; C25B11/031; C25B11/032; C25B11/04; C25B11/042; C25B11/043; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/109
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
116 words
A method of preparing an electrocatalytic gas diffusion electrode with an open pore carbon cloth, comprising the steps of depositing a first uniform mixture of noble-metal-catalyzed carbon and a hydrophobic binder on one side of said cloth and adhering said first mixture within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth, and similarly depositing a second uniform mixture of non-catalytic carbon and a hydrophobic binder to the remaining open pore portion on the other side of said cloth and adhering said second mixture within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth.
Claim 2
Independent Claim
116 words
A method of preparing an electrocatalytic gas diffusion electrode with an open pore carbon cloth, comprising the steps of depositing a first uniform mixture of noble-metal-catalyzed carbon and a hydrophobic binder on one side of said cloth and adhering said first mixture within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth, and similarly depositing a second uniform mixture of non-catalytic carbon and a hydrophobic binder to the remaining open pore portion on the other side of said cloth and adhering said second mixture within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said mixtures together substantially fill the thickness of said cloth.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein conducting carbon is inserted into the interior of the cloth between said two mixtures to provide improved conductive contact of the mixtures within the cloth.
Claim 5
Dependent Claim
40 words
The method of claim 1 and in which said depositing steps comprise preforming a sheet of one or both of the catalyzed and non-catalytic carbons in the hydrophobic binder and press-fitting the same against the respective sides of the cloth.
Claim 6
Dependent Claim
31 words
The method of claim 4 and in which conducting carbon is inserted into the interior of the cloth between said sheets to improve conductive contact of the same within the cloth.
Claim 7
Dependent Claim
90 words
An electrocatalytic gas diffusion electrode comprising an open pore carbon cloth carrying on one side a first uniform mixture of noble-metal-catalyzed carbon and a hydrophobic binder adhered within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth, and carrying on the other side of said cloth a second uniform mixture of non-catalytic carbon and a hydrophobic binder adhered within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth.
Claim 8
Dependent Claim
90 words
An electrocatalytic gas diffusion electrode comprising an open pore carbon cloth carrying on one side a first uniform mixture of noble-metal-catalyzed carbon and a hydrophobic binder adhered within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth, and carrying on the other side of said cloth a second uniform mixture of non-catalytic carbon and a hydrophobic binder adhered within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth.
Claim 9
Dependent Claim
18 words
An electrode as claimed in claim 6 wherein said mixtures together substantially fill the thickness of said cloth.
Claim 10
Dependent Claim
33 words
An electrode as claimed in claim 6 wherein conducting carbon is inserted into the interior of the cloth between said two mixtures to provide improved conductive contact of the mixtures within the cloth.
Claim 11
Dependent Claim
38 words
An electrode as claimed in claim 6 and in which said adhered mixtures comprise preformed sheets of one or both of the catalyzed and non-catalytic carbons in the hydrophobic binder press-fitted against the respective sides of the cloth.
Claim 12
Dependent Claim
31 words
An electrode as claimed in claim 9 and in which conducting carbon is inserted into the interior of the cloth to provide improved conductive contact of the sheets within the cloth.
Claim 13
Independent Claim
133 words
A method of preparing an electrocatalytic gas diffusion electrode with an open pore carbon cloth, comprising the steps of rigidizing said cloth by forming a carbonizing coating on the yarns thereof, depositing a first uniform mixture of noblemetal-catalyzed carbon and a hydrophobic binder on one side of the rigidized carbonized cloth and adhering said first mixture within the cloth pores and to the carbonized yarns of the cloth to a depth less than the thickness of the cloth, and similarly depositing a second uniform mixture of non-catalytic carbon and a hydrophobic binder to the remaining open pore portion on the other side of said rigidized carbonized cloth and adhering said second mixture within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth.
Claim 14
Independent Claim
133 words
A method of preparing an electrocatalytic gas diffusion electrode with an open pore carbon cloth, comprising the steps of rigidizing said cloth by forming a carbonizing coating on the yarns thereof, depositing a first uniform mixture of noblemetal-catalyzed carbon and a hydrophobic binder on one side of the rigidized carbonized cloth and adhering said first mixture within the cloth pores and to the carbonized yarns of the cloth to a depth less than the thickness of the cloth, and similarly depositing a second uniform mixture of non-catalytic carbon and a hydrophobic binder to the remaining open pore portion on the other side of said rigidized carbonized cloth and adhering said second mixture within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth.
Claim 15
Dependent Claim
104 words
An electrocatalytic gas diffusion electrode comprising an open pore carbon cloth the yarns of which are coated with a rigidizing carbonized coating and carrying on one side a first uniform mixture of noble-metal-catalyzed carbon and a hydrophobic binder adhered within the cloth pores and to the rigidized carbonized yarns of the cloth to a depth less than the thickness of the cloth, and carrying on the other side of said cloth a second uniform mixture of non-catalytic carbon and a hydrophobic binder adhered within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth.
Claim 16
Dependent Claim
104 words
An electrocatalytic gas diffusion electrode comprising an open pore carbon cloth the yarns of which are coated with a rigidizing carbonized coating and carrying on one side a first uniform mixture of noble-metal-catalyzed carbon and a hydrophobic binder adhered within the cloth pores and to the rigidized carbonized yarns of the cloth to a depth less than the thickness of the cloth, and carrying on the other side of said cloth a second uniform mixture of non-catalytic carbon and a hydrophobic binder adhered within the cloth pores and to the yarns of the cloth to a depth less than the thickness of the cloth.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |