US4344633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket for electrolytic cell
Assignee: Diamond Shamrock Chemicals Co
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Filing: 1981-05-22
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Granted: 1982-08-17
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Expires: 2001-05-22
Abstract
Abstract An improved multi-layer electrode gasket comprising an outboard layer of a material having a combination of a Type A Shore Scale Durometer hardness (ASTM Specification D-2240-75) ranging from about 40 to about 70 and a Compression Set (ASTM Specification D-395-69-Method A) of zero plus to about 40 percent with an inboard barrier layer of a material which is corrosion-resistant, noncontaminating and stable upon contact with the electrolyte in conjunction with the electrode chamber in which it is used.
Inventors
- 👤 Andrew J. Niksa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:13
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/002; C; C25; C25B; C25B9/00; C25B9/17; C25B9/19; C25B9/70; C25B9/73
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
A multi-layer gasket structure for an electrode comprising an outboard layer of a material having a combination of a Type A Shore Scale Durometer Hardness (ASTM Specification No. D-2240-7) ranging from about 40 to about 70 and a Compression Set (ASTM Specification D-395-69-Method A) of zero plus to about 40 percent and an inboard barrier layer of a material which is corrosion-resistant, noncontaminating and stable upon contact with chlor-alkali cell anolyte.
Claim 2
Dependent Claim
71 words
A multi-layer gasket structure for an electrode comprising an outboard layer of a material having a combination of a Type A Shore Scale Durometer Hardness (ASTM Specification No. D-2240-7) ranging from about 40 to about 70 and a Compression Set (ASTM Specification D-395-69-Method A) of zero plus to about 40 percent and an inboard barrier layer of a material which is corrosion-resistant, noncontaminating and stable upon contact with chlor-alkali cell anolyte.
Claim 3
Dependent Claim
15 words
A gasket as in claim 1 wherein said outboard gasket layer comprises rubber or elastomer.
Claim 4
Dependent Claim
13 words
A gasket as in claim 1 wherein said inboard gasket layer comprises polytetrafluoroethylene.
Claim 5
Dependent Claim
15 words
A gasket as in claim 3 wherein said polytetrafluoroethylene is a rope or ribbon thereof.
Claim 6
Dependent Claim
13 words
A gasket as in claim 2 wherein said outboard gasket material is rubber.
Claim 7
Dependent Claim
14 words
A gasket as in claim 2 wherein said outboard gasket material is an elastomer.
Claim 8
Dependent Claim
11 words
A gasket as in claim 5 wherein said rubber is neoprene.
Claim 9
Dependent Claim
18 words
A gasket as in claim 6 wherein said elastomer is a polymer of ethylene, propylene and a diene.
Claim 10
Dependent Claim
19 words
A gasket as in claim 1 wherein said outboard and inboard gasket layers are spaced apart from one another.
Claim 11
Dependent Claim
16 words
A gasket as in claim 1 wherein said outboard and inboard gasket layers contact one another.
Claim 12
Dependent Claim
14 words
A gasket as in claim 1 wherein the electrode being gasketed is an anode.
References Cited (Backward Citations)
GB1078129A
Cited
US3450621A
Cited
US3794577A
Cited
US4087343A
Cited
US4100053A
Cited
US4175025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |