Patent US4154665A successfully refreshed from Google Patents.
US4154665A
Expired / Lapsed
US
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Diaphragm cell
Assignee: Imperial Chemical Industries Ltd
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Filing: 1977-07-25
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Granted: 1979-05-15
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Expires: 1997-07-25
Abstract
Abstract An anode suitable for use in a chlor-alkali diaphragm cell comprised of one or two groups of coated film-forming metal parallel elongated members lying in a plane, or in separate parallel planes connected to one another. The members (e.g. wires) extend lengthwise from the point of connection and are resiliently mounted to give them flexibility.
Inventors
- 👤 Thomas W. Boulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:02
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
75 words
An anode comprising a group of substantially parallel bent elongated flexible anode members resiliently mounted to a support, the members being made of a film-forming metal or alloy thereof carrying on at least part of their surfaces an electrocatalytically active coating, all of the members of the group being arranged side-by-side in generally a single plane and each of the members extending lengthwise from the point of mounting in a direction away from the base.
Claim 2
Dependent Claim
75 words
An anode comprising a group of substantially parallel bent elongated flexible anode members resiliently mounted to a support, the members being made of a film-forming metal or alloy thereof carrying on at least part of their surfaces an electrocatalytically active coating, all of the members of the group being arranged side-by-side in generally a single plane and each of the members extending lengthwise from the point of mounting in a direction away from the base.
Claim 3
Dependent Claim
43 words
An anode as claimed in claim 1 wherein there are two groups of flexible anode members, the members in each group being conductively connected to each other and the planes of the groups facing each other and being substantially parallel to each other.
Claim 4
Dependent Claim
56 words
An anode as claimed in claim 2 wherein the planes are substantially rectangular or square, and the elongated members defining an edge in one plane are electrically conductively connected to the members defining an edge in the other plane so that the two planes extend substantially parallel to one another from the edges that are connected.
Claim 5
Dependent Claim
31 words
An anode as claimed in claim 2 wherein opposing pairs of elongated members in each group are fixed at their ends remote from the point of mounting to form closed loops.
Claim 6
Dependent Claim
19 words
An anode as claimed in claim 1 wherein the elongated members are bent to form one or more loops.
Claim 7
Dependent Claim
26 words
An anode as claimed in claim 1 wherein the elongated members in any one group are free at their ends remote from the point of mounting.
Claim 8
Dependent Claim
21 words
An anode as claimed in claim 6 wherein the support is a bridge piece of a film-forming metal or alloy thereof.
Claim 9
Dependent Claim
19 words
An anode as claimed in claim 1 wherein the elongated members are in the form of wires or rods.
Claim 10
Dependent Claim
13 words
An anode as claimed in claim 1 wherein the film-forming metal is titanium.
Claim 11
Dependent Claim
23 words
An anode as claimed in claim 1 whenever coated with a mixture of a platinum group metal oxide and a film-forming metal oxide.
Claim 12
Dependent Claim
18 words
An anode as claimed in claim 10 whenever coated with a mixture of ruthenium oxide and titanium dioxide.
Claim 13
Dependent Claim
29 words
An electrolytic cell comprising a plurality of anodes, a plurality of cathodes, and diaphragms separating the anodes and cathodes, and wherein each anode is as claimed in claim 1.
Claim 14
Dependent Claim
16 words
A cell as claimed in claim 12 wherein said support is a baseplate of the cell.
Claim 15
Dependent Claim
18 words
A cell as claimed in claim 13 wherein the baseplate is of a film-forming metal or alloy thereof.
Claim 16
Dependent Claim
32 words
A cell as claimed in claim 12 wherein said support is mounted on studs of a film-forming metal or alloy thereof which studs have been premounted on the baseplate of the cell.
Claim 17
Dependent Claim
13 words
A cell as claimed in claim 15 wherein the film-forming metal is titanium.
Claim 18
Dependent Claim
19 words
A cell as claimed in claim 12 wherein the anode/cathode gap is in the range up to 3 mm.
Claim 19
Dependent Claim
15 words
A cell as claimed in claim 12 wherein the cathode is of mild steel gauze.
Claim 20
Dependent Claim
12 words
A cell as claimed in claim 12 wherein the diaphragm comprises asbestos.
Claim 21
Dependent Claim
15 words
A cell as claimed in claim 12 wherein the diaphragm comprises polytetrafluoroethylene or polyvinylidene fluoride.
Claim 22
Dependent Claim
43 words
An electrolytic cell as in claim 12 wherein there are two groups of flexible anode members, the members in each group being conductively connected to each other and the planes of the groups facing each other and being substantially parallel to each other.
Claim 23
Dependent Claim
56 words
An electrolytic cell as in claim 21 wherein the planes are substantially rectangular or square, and the elongated members defining an edge in one plane are electrically conductively connected to the members defining an edge in the other plane so that the two planes extend substantially parallel to one another from the edges that are connected.
Claim 24
Dependent Claim
77 words
An anode comprising a rigid support; a group of substantially parallel elongated wires or rods made of a film-forming metal or alloy thereof carrying on at least a part of their surfaces an electrocatalytically active coating, each of said wires or rods having a flexible looped end portion fixed to said support, said elongated wires or rods being arranged side-by-side in generally a single plane and each of said wires or rods extending lengthwise from said support.
Claim 25
Dependent Claim
77 words
An anode comprising a rigid support; a group of substantially parallel elongated wires or rods made of a film-forming metal or alloy thereof carrying on at least a part of their surfaces an electrocatalytically active coating, each of said wires or rods having a flexible looped end portion fixed to said support, said elongated wires or rods being arranged side-by-side in generally a single plane and each of said wires or rods extending lengthwise from said support.
Claim 26
Dependent Claim
19 words
An electrolytic cell as in claim 12 wherein the elongated members are bent to form one or more loops.
Claim 27
Dependent Claim
26 words
An electrolytic cell as in claim 12 wherein the elongated members in any one group are free at their ends remote from the point of mounting.
Claim 28
Dependent Claim
19 words
An electrolytic cell as in claim 12 wherein the elongated members are in the form of wires or rods.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |