Patent US4255247A successfully refreshed from Google Patents.
US4255247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode
Assignee: AGC Inc
•
Filing: 1978-02-21
•
Granted: 1981-03-10
•
Expires: 1998-02-21
Abstract
Abstract An electrode is prepared by etching an alloy substrate comprising a first metallic component selected from the group consisting of chromium, manganese, tantalum, niobium, vanadium, titanium, silicon, zirconium, germanium, scandium, yttrium and lanthanum and a second metallic component selected from the group consisting of iron, nickel, tungsten, copper, silver, cobalt and molybdenum to remove at least part of the first metallic component.
Inventors
- 👤 Yoshio Oda
- 👤 Hiroshi Otouma
- 👤 Eiji Endoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:54
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
116 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises a first metallic component selected from the group consisting of chromium, manganese, tantalum, niobium, vanadium, titanium, silicon, zirconium, germanium, scandium, yttrium and lanthanum and a second metallic component selected from the group consisting of iron, nickel, tungsten, copper, silver, cobalt and molybdenum, wherein said alloy comprises 1 to 30 wt.% of the first metallic component and 99 to 70 wt.% of the second metallic component, and wherein said etching is sufficient to form 10 3 to 10 8 per cm 2 pores of average depths of 0.01 to 50μ on the surface of the substrate.
Claim 2
Dependent Claim
116 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises a first metallic component selected from the group consisting of chromium, manganese, tantalum, niobium, vanadium, titanium, silicon, zirconium, germanium, scandium, yttrium and lanthanum and a second metallic component selected from the group consisting of iron, nickel, tungsten, copper, silver, cobalt and molybdenum, wherein said alloy comprises 1 to 30 wt.% of the first metallic component and 99 to 70 wt.% of the second metallic component, and wherein said etching is sufficient to form 10 3 to 10 8 per cm 2 pores of average depths of 0.01 to 50μ on the surface of the substrate.
Claim 3
Dependent Claim
25 words
An electrode according to claim 1 wherein the electrode is a cathode used in an electrolysis of an aqueous solution of an alkali metal chloride.
Claim 4
Dependent Claim
18 words
An electrode according to claim 2 wherein the removement of the first metallic component is an etching treatment.
Claim 5
Dependent Claim
35 words
An electrode according to claim 3 wherein the etching is carried out immersing the alloy substrate in an aqueous solution of an alkali metal hydroxide at 90° to 250° C. for 1 to 500 hours.
Claim 6
Dependent Claim
22 words
An electrode according to claim 4 wherein the aqueous solution of an alkali metal hydroxide is an aqueous solution of sodium hydroxide.
Claim 7
Dependent Claim
42 words
An electrode according to claim 3 wherein the etching is an anodic polarization of the alloy substrate in an electrolytic cell under a potential of the plate to the saturated calomel electrode of -3.5 to +2.0 Volt for 1 to 500 hours.
Claim 8
Dependent Claim
43 words
An electrode according to claim 3 wherein the etching is to treat the alloy substrate in an electrolytic cell by applying a potential for an anodic polarization under a current density of 100 μA to 10,000 A/dm 2 for 1 to 500 hours.
Claim 9
Dependent Claim
27 words
An electrode according to claim 1 wherein the alloy is selected from the group consisting of iron-nickel-chromium alloy, iron-chromium alloy, nickel-molybdenum-chromium alloy, nickel-iron-molybdenum-manganese alloy and nickel-chromium alloy.
Claim 10
Dependent Claim
19 words
An electrode according to claim 1 wherein the alloy substrate is treated by a sand blasting before the etching.
Claim 11
Dependent Claim
29 words
An electrode according to claim 1 wherein the depth of the surface layer from which at least part of the first metallic component is removed is 0.01 to 50μ.
Claim 12
Dependent Claim
22 words
An electrode according to claim 1 wherein an electric double layer capacity of the surface layer is greater than 5000 μF/cm 2
Claim 13
Dependent Claim
86 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises chromium as the first metallic component and nickel as a second metallic component wherein the alloy comprises components of 10 to 30 wt.% Cr, 5 to 55 wt.% of Ni and 35 to 85 wt.% of Fe and wherein 30 to 70% of the first metallic component in the part of the depth of 0.01 to 50μ from the surface is removed by said etching.
Claim 14
Dependent Claim
86 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises chromium as the first metallic component and nickel as a second metallic component wherein the alloy comprises components of 10 to 30 wt.% Cr, 5 to 55 wt.% of Ni and 35 to 85 wt.% of Fe and wherein 30 to 70% of the first metallic component in the part of the depth of 0.01 to 50μ from the surface is removed by said etching.
Claim 15
Dependent Claim
25 words
An electrode according to claim 12 wehrein the electrode is a cathode used in an electrolysis of an aqueous solution of an alkali metal chloride.
Claim 16
Dependent Claim
35 words
An electrode according to clain 12 wherein the etching is carried out immersing the alloy substrate in an aqueous solution of an alkali metal hydroxide at 90° to 250° C. for 1 to 100 hours.
Claim 17
Dependent Claim
35 words
An electrode according to clain 12 wherein the etching is carried out immersing the alloy substrate in an aqueous solution of an alkali metal hydroxide at 90° to 250° C. for 1 to 100 hours.
Claim 18
Dependent Claim
22 words
An electrode according to claim 12 wherein the aqueous solution of an alkali metal hydroxide is an aqueous solution of sodium hydroxide.
Claim 19
Dependent Claim
42 words
An electrode according to claim 12 wherein the etching is an anodic polarization of the alloy substrate in an electrolytic cell under a potential of the plate to the saturated calomel electrode of -3.5 to +12.0 Volt for 1 to 500 hours.
Claim 20
Dependent Claim
43 words
An electrode according to claim 12 wherein the etching is to treat the alloy substrate in an electrolytic cell by applying a potential for an anodic polarization under a current density of 100 μA to 10,000 A/dm 2 for 1 to 500 hours.
Claim 21
Dependent Claim
19 words
An electrode according to claim 12 wherein the alloy substrate is treated by a sand blasting before the etching.
Claim 22
Dependent Claim
35 words
An electrode according to claim 12 wherein said etching is sufficient to form 10 3 to 10 8 per cm 2 pores of average depths of 0.01 to 50μ on the surface of the substrate.
Claim 23
Dependent Claim
23 words
An electrode according to claim 12 wherein an electric double layer capacity of the surface layer is greater than 5000 μF/cm 2 .
Claim 24
Dependent Claim
96 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises a first metallic component selected from the group consisting of chromium, manganese, tantalum, niobium, vanadium, titanium, zirconium, germanium, scandium, yttrium and lanthanum and a second metallic component selected from the group consisting of iron, nickel, tungsten, silver, cobalt and molybdenum, wherein 1 to 70 wt.% of the first metallic component is removed from the alloy comprising 1 to 30 wt.% of the first metallic component and 70 to 99 wt.% of the second metallic ocmponent.
Claim 25
Dependent Claim
96 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises a first metallic component selected from the group consisting of chromium, manganese, tantalum, niobium, vanadium, titanium, zirconium, germanium, scandium, yttrium and lanthanum and a second metallic component selected from the group consisting of iron, nickel, tungsten, silver, cobalt and molybdenum, wherein 1 to 70 wt.% of the first metallic component is removed from the alloy comprising 1 to 30 wt.% of the first metallic component and 70 to 99 wt.% of the second metallic ocmponent.
Claim 26
Dependent Claim
94 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises a first metallic component selected from the group consisting of chromium, manganese, tantalum, niobium, vanadium, titanium, silicon, zirconium, germanium, scandium, yttrium, lanthanum and alloys thereof and a second metallic component selected from the group consisting of iron, nickel, tungsten, copper, silver, cobalt, molybdenum and alloys thereof wherein the surface layer of the electrode comprises 15 to 90 wt.% of Fe, 10 to 75 wt.% of Ni and 0 to 20 wt.% of Cr.
Claim 27
Dependent Claim
94 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises a first metallic component selected from the group consisting of chromium, manganese, tantalum, niobium, vanadium, titanium, silicon, zirconium, germanium, scandium, yttrium, lanthanum and alloys thereof and a second metallic component selected from the group consisting of iron, nickel, tungsten, copper, silver, cobalt, molybdenum and alloys thereof wherein the surface layer of the electrode comprises 15 to 90 wt.% of Fe, 10 to 75 wt.% of Ni and 0 to 20 wt.% of Cr.
Claim 28
Dependent Claim
79 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises chromium as the first metallic component and nickel as a second metallic component wherein the alloy comprises components of 5 to 50 wt.% Cr and 40 to 80 wt.% Ni and wherein 30 to 70% of the first metallic component in the part of the depth of 0.01 to 50μ from the surface is removed by said etching.
Claim 29
Dependent Claim
79 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises chromium as the first metallic component and nickel as a second metallic component wherein the alloy comprises components of 5 to 50 wt.% Cr and 40 to 80 wt.% Ni and wherein 30 to 70% of the first metallic component in the part of the depth of 0.01 to 50μ from the surface is removed by said etching.
Claim 30
Dependent Claim
25 words
An electrode according to claim 23 wherein the electrode is a cathode used in an electrolysis of an aqueous solution of an alkali metal chloride.
Claim 31
Dependent Claim
35 words
An electrode according to claim 23 wherein the etching is carried out immersing the alloy substrate in an aqueous solution of an alkali metal hydroxide at 90° to 250° C. for 1 to 500 hours.
Claim 32
Dependent Claim
22 words
An electrode according to claim 23 wherein the aqueous solution of an alkali metal hydroxide is an aqueous solution of sodium hydroxide.
Claim 33
Dependent Claim
42 words
An electrode according to claim 23 wherein the etching is an anodic polarization of the alloy substrate in an electrolytic cell under a potential of the plate to the saturated calomel electrode of -3.5 to +2.0 Volt for 1 to 500 hours.
Claim 34
Dependent Claim
43 words
An electrode according to claim 23 wherein the etching is to treat the alloy substrate in an electrolytic cell by applying a potential for an anodic polarization under a current density of 100 μA to 10,000 A/dm 2 for 1 to 500 hours.
Claim 35
Dependent Claim
19 words
An electrode according to claim 23 wherein the alloy substrate is treated by a sand blasting before the etching.
Claim 36
Dependent Claim
23 words
An electrode according to claim 23 wherein an electric double layer capacity of the surface layer is greater than 5000 μF/cm 2 .
Claim 37
Dependent Claim
82 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises chromium as the first metallic component and nickel as a second metallic component wherein the alloy comprises components of 5 to 50 wt.% chromium and 40 to 80 wt.% nickel and wherein said etching is sufficient to form 10 3 to 10 8 per cm 2 pores of average depth of 0.01 to 50 micron on the surface of the substrate.
Claim 38
Dependent Claim
82 words
An electrode prepared by etching at least a portion of a first metallic component from an alloy substrate which alloy comprises chromium as the first metallic component and nickel as a second metallic component wherein the alloy comprises components of 5 to 50 wt.% chromium and 40 to 80 wt.% nickel and wherein said etching is sufficient to form 10 3 to 10 8 per cm 2 pores of average depth of 0.01 to 50 micron on the surface of the substrate.
References Cited (Backward Citations)
GB634097A
Cited
US3248787A
Cited
GB1132833A
Cited
US3380934A
Cited
US3673116A
Cited
US3637437A
Cited
JPS5154877A
Cited
US3997478A
Cited
US4024044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |