US4585527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1985-01-25
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Granted: 1986-04-29
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Expires: 2005-01-25
Abstract
Abstract An electrolytic cell comprising an anode and cathode and a gasket of an electrically insulating composition in which the gasket is made of an electrically insulating composition which comprises a homogeneous mixture of an elastomeric polymer and at least 15%, and optionally up to 70%, of polytetrafluoroethylene by weight of the composition. Also a gasket suitable for use in an electrolytic cell, and a process of electrolysis which is operated in the electrolytic cell. Aqueous alkali metal chloride solution may be electrolysed in the electrolytic cell.
Inventors
- 👤 Herbert S. Northway
- 👤 Norman Tattam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:26
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/102; C; C25; C25B; C25B9/00; C25B9/60; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
An electrolytic cell comprising an anode or a plurality of anodes and a cathode or a plurality of cathodes, and one or more gaskets of an electrically insulating composition, characterised in that the gasket is made at least in part of an electrically insulating composition which comprises a homogeneous mixture of one or more elastomeric polymers and at least 15% of polytetrafluoroethylene by weight of the composition.
Claim 2
Dependent Claim
67 words
An electrolytic cell comprising an anode or a plurality of anodes and a cathode or a plurality of cathodes, and one or more gaskets of an electrically insulating composition, characterised in that the gasket is made at least in part of an electrically insulating composition which comprises a homogeneous mixture of one or more elastomeric polymers and at least 15% of polytetrafluoroethylene by weight of the composition.
Claim 3
Dependent Claim
45 words
An electrolytic cell as claimed in claim 1 characterised in that the whole of the gasket is made of an electrically insulating composition which comprises a homogeneous mixture of one or more elastomeric polymers and at least 15% of polytetrafluoroethylene by weight of the composition.
Claim 4
Dependent Claim
29 words
An electrolytic cell as claimed in claim 1 characterised in that the elastomeric polymer in the composition of the gasket comprises a hydrocarbon polymer and/or a substituted hydrocarbon polymer.
Claim 5
Dependent Claim
18 words
An electrolytic cell as claimed in claim 3 characterised in that the elastomeric polymer is an ethylene-propylene-diene copolymer.
Claim 6
Dependent Claim
28 words
An electrolytic cell as claimed in claim 1 characterised in that the electrically-insulating composition of the gasket comprises at least 25% of polytetrafluoroethylene by weight of the composition.
Claim 7
Dependent Claim
28 words
An electrolytic cell as claimed in claim 1 characterised in that the electrically-insulating composition of the gasket comprises up to 70% of polytetrafluoroethylene by weight of the composition.
Claim 8
Dependent Claim
22 words
An electrolytic cell as claimed in claim 1 characterised in that the cell comprises a separator between each anode and adjacent cathode.
Claim 9
Dependent Claim
45 words
A process of electrolysis which comprises charging an electrolyte to an electrolytic cell, electrolysing the electrolyte in the electrolytic cell, and removing the products of electrolysis from the electrolytic cell, characterised in that the electrolytic cell is an electrolytic cell as claimed in claim 1.
Claim 10
Dependent Claim
23 words
A process of electrolysis as claimed in claim 8 characterised in that the electrolyte is an aqueous solution of an alkali metal chloride.
Claim 11
Dependent Claim
42 words
A process of electrolysis as claimed in claim 9 characterised in that the electrolytic cell comprises a separator between each anode and adjacent cathode and in that the products of electrolysis include chlorine and an aqueous solution containing an alkali metal hydroxide.
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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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |