US4851099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell
Assignee: Imperial Chemical Industries Ltd
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Filing: 1987-10-27
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Granted: 1989-07-25
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Expires: 2007-10-27
Abstract
Abstract An electrolytic cell comprising a plurality of anodes and cathodes and a separator positioned between each anode and adjacent cathode to form a plurality of anode compartments and cathode compartments, in which a barrier member is positioned at an upper part of the cell between an anode and an adjacent separator, or between a cathode and an adjacent separator, and which, in operation shields the separator from contact with a gaseous product of electrolysis which may collect in an upper part of the anode compartment, or in an upper part of the cathode compartment. The separator may be an ion-exchange membrane, and the barrier member protects the separator from chemical attach by gaseous products of electrolysis.
Inventors
- 👤 Colin Brereton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:22
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/70; C25B9/73; C25B9/17; C25B9/19; C25B9/21; C25B9/60; C25B9/63; C25B9/75; C25B9/77
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
An electrolytic cell comprising a plurality of substantially vertically positioned electrodes and a separator positioned between adjacent pairs of electrodes thereby dividing the cell into a plurality of separate electrode compartments, in which a barrier member is positioned at an upper part of an electrode compartment between an electrode and an adjacent separator which barrier member extends for substantially the full width of the electrode compartment, and which in operation of the electrolytic cell, shields the separator from contact with a gaseous product of electrolysis which may collect in an upper part of the electrode compartment.
Claim 2
Dependent Claim
96 words
An electrolytic cell comprising a plurality of substantially vertically positioned electrodes and a separator positioned between adjacent pairs of electrodes thereby dividing the cell into a plurality of separate electrode compartments, in which a barrier member is positioned at an upper part of an electrode compartment between an electrode and an adjacent separator which barrier member extends for substantially the full width of the electrode compartment, and which in operation of the electrolytic cell, shields the separator from contact with a gaseous product of electrolysis which may collect in an upper part of the electrode compartment.
Claim 3
Dependent Claim
125 words
An electrolytic cell as claimed in claim 1 comprising a plurality of substantially vertically positioned anodes and cathodes and a separator positioned between each anode and adjacent cathode thereby dividing the cell into a plurality of anode compartments and cathode compartments, in which a barrier member is positioned at an upper part of an anode compartment of the cell between an anode and an adjacent separator, or at an upper part of a cathode compartment of the cell between a cathode and an adjacent separator, which barrier member, in operation of the electrolytic cell, shields the separator from contact with a gaseous product of electrolysis which may collect in an upper part of the anode compartment, or in an upper part of the cathode compartment.
Claim 4
Dependent Claim
43 words
An electrolytic cell as claimed in claim 1 in which the barrier member has sufficient depth that in operation it shields the separator from substantially all of the gaseous products of electrolysis which may collect in an upper part of the electrode compartment.
Claim 5
Dependent Claim
30 words
An electrolytic cell as claimed in claim 1 in which a barrier member is positioned between an anode and an adjacent separator and between a cathode and an adjacent separator.
Claim 6
Dependent Claim
31 words
An electrolytic cell as claimed in claim 4 which is a monopolar cell comprising a plurality of alternating anodes and cathodes with a separator positioned between each anode and adjacent cathode.
Claim 7
Dependent Claim
59 words
An electrolytic cell as claimed in claim 4 which is a bipolar cell comprising a plurality of bipolar electrodes one face of which functions as an anode and an opposite face of which functions as a cathode and in which a separator is positioned between an anode of one bipolar electrode and a cathode of an adjacent bipolar electrode.
Claim 8
Dependent Claim
15 words
An electrolytic cell as claimed in claim 6 which is of the filter press type.
Claim 9
Dependent Claim
36 words
An electrolytic cell as claimed in claim 7 which comprises a plurality of anodes, cathodes and frame-like gaskets of an electrically insulating material in which the frame-like gaskets are positioned between each anode and adjacent cathode.
Claim 10
Dependent Claim
22 words
An electrolytic cell as claimed in claim 8 in which the anodes and cathodes are positioned in recesses in the frame-like gaskets.
Claim 11
Dependent Claim
30 words
An electrolytic cell as claimed in claim 8 or claim 9 in which the frame-like gasket comprises a central opening and the barrier member is positioned across the central opening.
Claim 12
Dependent Claim
18 words
An electrolytic cell as claimed in any one of claims 8 to 10 in which gaskets are resilient.
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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) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |