US4348268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for electrolysis of water
Assignee: BBC BROWN BOVERI & Co
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Filing: 1980-06-17
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Granted: 1982-09-07
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Expires: 2000-06-17
Abstract
Abstract A bipolar electrode for electrolysis of water. A porous graphite plate is coated on one face with a layer of TiO 2 doped with a mixture of RuO 2 and IrO 2 . The uncoated surface of the porous graphite plate may be grooved.
Inventors
- 👤 Rene Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:49
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
A porous electrode for electrolysis of water comprising a plate of porous graphite having one major surface thereof coated with a thin layer comprised of titanium and titanium oxide doped with a catalyst comprising mixture of about 20 mole percent of RuO 2 and about 80 mole percent of IrO 2 totalling 100% the thickness of said layer comprised of titanium and titanium oxide being from 0.1 to 0.5 micrometers, the coated graphite surface and the opposite uncoated graphite surface being exterior surfaces of the electrode.
Claim 2
Dependent Claim
86 words
A porous electrode for electrolysis of water comprising a plate of porous graphite having one major surface thereof coated with a thin layer comprised of titanium and titanium oxide doped with a catalyst comprising mixture of about 20 mole percent of RuO 2 and about 80 mole percent of IrO 2 totalling 100% the thickness of said layer comprised of titanium and titanium oxide being from 0.1 to 0.5 micrometers, the coated graphite surface and the opposite uncoated graphite surface being exterior surfaces of the electrode.
Claim 3
Dependent Claim
25 words
The electrode of claim 1 having grooves on the major surface opposite to the surface coated with said layer comprised of titanium and titanium oxide.
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) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |