Patent US4257856A successfully refreshed from Google Patents.
US4257856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic process useful for the electrolysis of water
Assignee: AT&T Inc
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Filing: 1979-10-17
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Granted: 1981-03-24
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Expires: 1999-10-17
Abstract
Abstract It is possible to significantly increase the efficiency of the electrolysis of water into hydrogen and oxygen while maintaining stability of the anode. This efficiency increase is obtained by using an iridium oxide anode which is produced by vacuum deposition techniques.
Inventors
- 👤 Gerardo Beni
- 👤 William C. Dautremont-Smith
- 👤 Lawrence M. Schiavone
- 👤 Joseph L. Shay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/075; C25B1/00; C25B1/01; C25B1/02; C25B1/04; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A process of electrolyzing water comprising the steps of contacting an aqueous medium with a cathode and an anode and applying to said cathode and said anode a potential between these electrodes sufficient to produce hydrogen characterized in that said anode comprises sputtered iridium oxide.
Claim 2
Dependent Claim
45 words
A process of electrolyzing water comprising the steps of contacting an aqueous medium with a cathode and an anode and applying to said cathode and said anode a potential between these electrodes sufficient to produce hydrogen characterized in that said anode comprises sputtered iridium oxide.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said aqueous medium is acidic.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein said aqueous medium is basic.
Claim 5
Dependent Claim
37 words
An electrolytic cell comprising a first and second electrode characterized in that said first electrode comprises sputtered iridium oxide, said second electrode is adapted to promote the production of hydrogen, and means are provided for collecting hydrogen.
Claim 6
Dependent Claim
37 words
An electrolytic cell comprising a first and second electrode characterized in that said first electrode comprises sputtered iridium oxide, said second electrode is adapted to promote the production of hydrogen, and means are provided for collecting hydrogen.
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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |