US4200515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered metal powder-coated electrodes for water electrolysis prepared with polysilicate-based paints
Assignee: Huntington Alloys Corp
•
Filing: 1979-01-16
•
Granted: 1980-04-29
•
Expires: 1999-01-16
Abstract
Abstract An electrode for water electrolyzers comprising a steel base having a sintered porous layer of nickel, nickel-iron or iron on the steel base and having an electrochemically formed oxidic layer or hydrogen saturation associated with the sintered layer.
Inventors
- 👤 Dale E. Hall
- 👤 Ernest L. Huston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:46
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/075; C25B11/091
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
An electrode for water electrolyzers comprising an electrically conductive support surface having a porous metallurgically bonded layer of metal about 50 to 150 μm thick comprised of particles from the group of nickel, nickel-iron alloys, iron and iron-carbon alloys said particles being in the size range of about 2 to 30 μm and being sintered together to a theoretical density of about 50% in such manner as to retain individual particle appearance while being adhered to at least part of said support surface, said porous metallurgically bonded layer comprising nickel and nickel-iron alloys containing at least 10% nickel and having a hydrated, electrochemically formed layer of oxide, incorporating metal of said metallurgically bonded layer on the external and internal surfaces of said porous layer when said electrode is an anode and said porous metallurgically bonded layer being saturated with hydrogen when said electrode is a cathode.
Claim 2
Dependent Claim
146 words
An electrode for water electrolyzers comprising an electrically conductive support surface having a porous metallurgically bonded layer of metal about 50 to 150 μm thick comprised of particles from the group of nickel, nickel-iron alloys, iron and iron-carbon alloys said particles being in the size range of about 2 to 30 μm and being sintered together to a theoretical density of about 50% in such manner as to retain individual particle appearance while being adhered to at least part of said support surface, said porous metallurgically bonded layer comprising nickel and nickel-iron alloys containing at least 10% nickel and having a hydrated, electrochemically formed layer of oxide, incorporating metal of said metallurgically bonded layer on the external and internal surfaces of said porous layer when said electrode is an anode and said porous metallurgically bonded layer being saturated with hydrogen when said electrode is a cathode.
Claim 3
Dependent Claim
16 words
An anode as in claim 1 wherein said electrically conductive support surface is a mild steel.
Claim 4
Dependent Claim
24 words
An anode as in claim 1 wherein the porous, metallurgically bonded layer is a nickel layer which is sintered to a mild steel base.
Claim 5
Dependent Claim
22 words
An anode as in claim 1 wherein the porous metallurgically bonded layer is a nickel-iron alloy layer sintered to a mild base.
Claim 6
Dependent Claim
17 words
A cathode as in claim 1 wherein the metal of said metallurgically bonded layer is mild steel.
References Cited (Backward Citations)
GB921561A
Cited
US4049841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |