Patent US4521769A successfully refreshed from Google Patents.
Patent US4493759A successfully refreshed from Google Patents.
US4493759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell
Assignee: Imperial Chemical Industries Ltd
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Filing: 1983-05-16
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Granted: 1985-01-15
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Expires: 2003-05-16
Abstract
Abstract An electrolytic cell, and a gasket therefor, the cell comprising at least one anode and at least one cathode and a separator positioned between an anode and adjacent cathode and dividing the cell into separate anode and cathode compartments, the gasket comprising a plurality of projections and recesses on or in a surface thereof, and preferably on or in both surfaces thereof, adapted to cooperate with corresponding recesses and projections in or on a surface of an anode or cathode or a gasket adjacent thereto.
Inventors
- 👤 Thomas W. Boulton
- 👤 Brian J. Derwent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:26
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/70; C25B9/73; C25B9/77; C25B9/60
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
88 words
An electrolytic cell comprising at least one anode and at least one cathode, a separator positioned between an anode and adjacent cathode and dividing the cell into separate anode and cathode compartments, and at least one gasket of an electrically insulating material positioned between adjacent anodes and cathodes, characterized in that the gasket has a plurality of projections and recesses on or in a surface thereof adapted to co-operate with corresponding recesses and projections in or on a surface of an anode and/or of a cathode adjacent thereto.
Claim 2
Dependent Claim
88 words
An electrolytic cell comprising at least one anode and at least one cathode, a separator positioned between an anode and adjacent cathode and dividing the cell into separate anode and cathode compartments, and at least one gasket of an electrically insulating material positioned between adjacent anodes and cathodes, characterized in that the gasket has a plurality of projections and recesses on or in a surface thereof adapted to co-operate with corresponding recesses and projections in or on a surface of an anode and/or of a cathode adjacent thereto.
Claim 3
Dependent Claim
34 words
An electrolytic cell as in claim 1 characterized in that the gasket is of planar frame-like construction having a space inside of the frame which forms a part of an anode or cathode compartment.
Claim 4
Dependent Claim
39 words
An electrolytic cell as in claim 1 characterized in that the projections and recesses on or in a surface of a gasket also co-operate with corresponding recesses and projections in or on a surface of another gasket adjacent thereto.
Claim 5
Dependent Claim
24 words
An electrolytic cell as in claim 1 characterized in that the gasket comprises projections and recesses on or in opposite surfaces of the gasket.
Claim 6
Dependent Claim
104 words
An electrolytic cell as in claim 1 characterized in that an anode or cathode are positioned between a pair of gaskets, the gaskets comprise a plurality of projections and recesses on or in at least the surfaces of the gaskets facing the anode or cathode, the anode or cathode comprises a plurality of recesses and projections in or on the surfaces thereof, and the projections on the surface of one or both of the gaskets pass through the recesses in the anode or cathode and co-operate with corresponding recesses in the surface of the gasket on the opposite side of the anode or cathode.
Claim 7
Dependent Claim
37 words
An electrolytic cell as claimed in claim 5 characterized in that the anode or cathode comprise a plurality of projections on a surface thereof which co-operate with corresponding recesses in the surface of a gasket adjacent thereto.
Claim 8
Dependent Claim
35 words
An electrolytic cell as in claim 1 characterized in that the projections and recesses on or in a surface of a gasket are spaced apart by a distance in the range 1 to 20 cm.
Claim 9
Dependent Claim
22 words
An electrolytic cell as in claim 1 characterized in that the gasket has a thickness in the range 1 to 20 mm.
Claim 10
Dependent Claim
18 words
An electrolytic cell as in claim 1 characterized in that the gasket is made of a resilient material.
Claim 11
Dependent Claim
16 words
An electrolytic cell as in claim 1 characterized in that the separator is a microporous diaphragm.
Claim 12
Dependent Claim
16 words
An electrolytic cell as in claim 1 characterized in that the separator is a cation-exchange membrane.
Claim 13
Dependent Claim
23 words
An electrolytic cell as in claim 1 characterized in that the separator is clamped between the surfaces of a pair of adjacent gaskets.
Claim 14
Dependent Claim
36 words
An electrolytic cell as in claim 1 characterized in that the cell is a filter press cell comprising a plurality of alternating anodes and cathodes and one or more gaskets positioned between adjacent anodes and cathodes.
Claim 15
Dependent Claim
34 words
An electrolytic cell as in claim 13 characterized in that the gasket is of planar frame-like construction having a space inside of the frame which forms a part of an anode or cathode compartment.
Claim 16
Dependent Claim
39 words
An electrolytic cell as in claim 13 characterized in that the projections and recesses on or in a surface of a gasket also co-operate with corresponding recesses and projections in or on a surface of another gasket adjacent thereto.
Claim 17
Dependent Claim
35 words
An electrolytic cell as in claim 13 characterized in that the projections and recesses on or in a surface of a gasket are spaced apart by a distance in the range 1 to 20 cm.
Claim 18
Dependent Claim
22 words
An electrolytic cell as in claim 13 characterized in that the gasket has a thickness in the range 1 to 20 mm.
Claim 19
Dependent Claim
18 words
An electrolytic cell as in claim 13 characterized in that the gasket is made of a resilient material.
Claim 20
Dependent Claim
16 words
An electrolytic cell as in claim 13 characterized in that the separator is a microporous diaphragm.
Claim 21
Dependent Claim
16 words
An electrolytic cell as in claim 13 characterized in that the separator is a cation-exchange membrane.
Claim 22
Dependent Claim
23 words
An electrolytic cell as in claim 13 characterized in that the separator is clamped between the surfaces of a pair of adjacent gaskets.
References Cited (Backward Citations)
US4253932A
Cited
US4175025A
Cited
JPS5556373A
Cited
US4274939A
Cited
US4368109A
Cited
US4379814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |