US4330387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified carbon or graphite fibrous percolating porous electrode, and electrochemical reactors fitted with such an electrode
Assignee: Societe National Elf Aquitaine
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Filing: 1980-12-16
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Granted: 1982-05-18
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Expires: 2000-12-16
Abstract
Abstract This invention concerns a fibrous percolating porous electrode of the type containing a fibrous porous matrix made of carbon or graphite. The fibrous porous matrix, such as a carbon or graphite felt, is modified, for example by impregnation with a surface-active agent, and in the wetted state its apparent density in relation to water possesses specific values.
Inventors
- 👤 Michel Astruc
- 👤 Pierre-Yves Guyomar
- 👤 Catherine Lestrade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:17
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/02; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/46104; C02F1/46109; C02F1/467; C02F1/4672; C02F1/4676; C02F1/4678; C02F2001/46133; C02F2001/46152; C02F2001/46157; C02F2001/46161; C02F2101/00; C02F2101/10; C02F2101/16; C02F2101/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A fibrous percolating porous electrode comprising a fibrous carbon or graphite porous matrix impregnated with a surface active agent having an apparent density in relation to water, in the wetted state, between 1.6 and 3 times the apparent density in relation to water of the corresponding non-impregnated fibrous porous matrix in the wetted state.
Claim 2
Dependent Claim
54 words
A fibrous percolating porous electrode comprising a fibrous carbon or graphite porous matrix impregnated with a surface active agent having an apparent density in relation to water, in the wetted state, between 1.6 and 3 times the apparent density in relation to water of the corresponding non-impregnated fibrous porous matrix in the wetted state.
Claim 3
Dependent Claim
44 words
An electrode according to claim 1, wherein the apparent density of the impregnated matrix in relation to water, in the wetted state, is between 1.8 and 2.7 times the apparent density in relation to water of the corresponding non-modified matrix in the wetted state.
Claim 4
Dependent Claim
25 words
An electrode according to claim 1, wherein the HLB number of the surface-active agent used to impregnate the modified matrix is between 5 and 20.
Claim 5
Dependent Claim
16 words
An electrode according to claim 3, wherein the HLB number is comprised between 10 and 16.
Claim 6
Dependent Claim
19 words
An electrode according to claim 1, in which the fibrous porous matrix is made from carbon or graphite felt.
Claim 7
Dependent Claim
27 words
An electrochemical reactor comprising one or more percolating porous electrodes at least one of said percolating porous electrodes is the electrode of claim 1 and a counter-electrode.
Claim 8
Dependent Claim
40 words
A reactor of claim 6 comprising a cell with an inlet and an outlet, said at least one percolating porous electrode being located in the vicinity of said inlet and said counter-electrode being located in the vicinity of said outlet.
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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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |