US4098671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode for electrolytic process involving hydrogen generation
Assignee: Gow Enterprises Ltd
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Filing: 1977-04-18
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Granted: 1978-07-04
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Expires: 1997-04-18
Abstract
Abstract A novel cathode is provided which comprises a porous titanium sheet having a cathodic exposed surface of hydrided titanium, preferably where the core of the sheet is of less porosity or higher density than the surface. The hydrided surface of the cathode may include a coating of silver thereon and therein within the pores, or the hydrided surface of the cathode, either as such or one provided with the silver coating may further include a coating of MoS 2 thereon and therein within the pores. Such cathode can be either a monopolar or a bipolar electrode. The core of the cathode is of low porosity to provide improved current transfer and has a surface area of large pore size to enable low cathodic overvoltage.
Inventors
- 👤 H. Benny Westerlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02; C25B11/04; C25B11/042; C25B11/051; C25B11/073; C25B11/075; C25B11/091
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
84 words
A cathode comprising: (a) a microporous titanium sheet having a central core and surfaces, the pores in the central core being of greater diameter than the pores at the surfaces thereby providing a central core of less porosity than the surfaces; and (b) one exposed surface thereof being microporous hydrided titanium, the hydrided titanium having pores of greater diameter than those of the porous titanium sheet and thus being more porous than the surface of the porous titanium sheet on which it is provided.
Claim 2
Dependent Claim
84 words
A cathode comprising: (a) a microporous titanium sheet having a central core and surfaces, the pores in the central core being of greater diameter than the pores at the surfaces thereby providing a central core of less porosity than the surfaces; and (b) one exposed surface thereof being microporous hydrided titanium, the hydrided titanium having pores of greater diameter than those of the porous titanium sheet and thus being more porous than the surface of the porous titanium sheet on which it is provided.
Claim 3
Dependent Claim
20 words
The cathode of claim 1 wherein the hydrided surface includes a coating of silver thereon and therein within the pores.
Claim 4
Dependent Claim
21 words
The cathode of claim 1 wherein the hydrided surface includes a coating of MoS 2 thereon and therein within the pores.
Claim 5
Dependent Claim
21 words
The cathode of claim 2 wherein the hydrided surface includes a coating of MoS 2 thereon and therein within the pores.
Claim 6
Dependent Claim
23 words
The cathode of claim 1 wherein one face is provided with a coating of an anodic material, thereby providing a front-to-back bipolar electrode.
Claim 7
Dependent Claim
29 words
The cathode of claim 1 wherein an edge thereof is provided with a sheet-like extension whose surfaces are provided with an anodic coating thereby providing an end-to-end bipolar electrode.
Claim 8
Dependent Claim
81 words
The cathode of claim 6 including a generally U-shaped in cross-section median electrode plate formed of titanium or a titanium alloy, interposed between, and connected to, each of the titanium anode extension and the porous titanium cathode, the median electrode extending below the bottom edge of the anode and the cathode, and extending above the top edge of the anode and; a plurality of electrically insulating spacer elements projecting outwardly from both side faces of at least the plate-like metallic cathode.
Claim 9
Dependent Claim
38 words
The cathode of claim 7 wherein the median electrode comprises an extension of the porous cathode and includes a vertical forwardly protruding ridge, and a corresponding vertical dorsal channel to cooperate with a ridge of an adjacent cathode.
Claim 10
Dependent Claim
45 words
The cathode of claim 6 wherein the sheet-like extension is a separate anodic element butt welded to an end of the cathodic element, and wherein each face of the cathodic element adjacent said weld joint is provided with an electrically non-conductive plastic material divider strip.
Claim 11
Dependent Claim
14 words
A cathode according to claim 1, wherein the core is sintered micro size powder.
Claim 12
Dependent Claim
26 words
A cathode comprising a porous titanium sheet having a cathodic surface wherein the hydrided surface includes a coating of MoS 2 thereon and within the pores.
Claim 13
Dependent Claim
26 words
A cathode comprising a porous titanium sheet having a cathodic surface wherein the hydrided surface includes a coating of MoS 2 thereon and within the pores.
Claim 14
Dependent Claim
20 words
A cathode according to claim 11, wherein the hydrided surface includes a coating of silver thereon and within the pores.
Claim 15
Dependent Claim
38 words
A cathode material comprising a sintered microporous titanium sheet having a central core and two sides, the central core formed from smaller size titanium powder than the two sides and having a lower porosity than the two sides.
Claim 16
Dependent Claim
38 words
A cathode material comprising a sintered microporous titanium sheet having a central core and two sides, the central core formed from smaller size titanium powder than the two sides and having a lower porosity than the two sides.
Claim 17
Dependent Claim
25 words
A cathode material according to claim 13, wherein the central core has a porosity of 20% and the two sides have a porosity of 75%.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |