US4539082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Woven diaphragm for aqueous electrolytes
Assignee: C CRAMER & Co HEER-NIENBORG GERMANY A CORP
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Filing: 1984-06-06
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Granted: 1985-09-03
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Expires: 2004-06-06
Abstract
Abstract A woven diaphragm for a diaphragm electrolysis cell for electrolysis of aqueous solutions containing ions such as alkali metal ions, chloride ions, and sulfate ions which diaphragm comprises warp threads and weft threads. Both warp threads and weft threads are of multifil filaments. Weft threads contain less than about 200 per meter and warp threads contain less than 400 per meter.
Inventors
- 👤 Helmut Klotz
- 👤 Klaus Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:02
CPC Classifications
C; C25; C25B; C25B13/00
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
36 words
A woven diaphragm for an electrolytic cell comprising warp threads and weft threads, wherein said warp threads and said weft threads comprise multifil filaments and said weft threads contain less than about 200 turns per meter.
Claim 2
Dependent Claim
36 words
A woven diaphragm for an electrolytic cell comprising warp threads and weft threads, wherein said warp threads and said weft threads comprise multifil filaments and said weft threads contain less than about 200 turns per meter.
Claim 3
Dependent Claim
18 words
A diaphragm as claimed in claim 1, wherein said weft threads contain less than 50 turns per meter.
Claim 4
Dependent Claim
18 words
A diaphragm as claimed in claim 1, wherein said warp threads contain less than 400 turns per meter.
Claim 5
Dependent Claim
19 words
A diaphragm as claimed in claim 1, wherein said warp threads contain from 100 to 200 turns per meter.
Claim 6
Dependent Claim
18 words
A diaphragm as claimed in claim 1, wherein said weft threads comprise from 20 to 70 individual filaments.
Claim 7
Dependent Claim
21 words
A diaphragm as claimed in claim 1, wherein said weft threads are made up of from 35 to 55 individual filaments.
Claim 8
Dependent Claim
18 words
A diaphragm as claimed in claim 1, wherein said weft threads comprise from 20 to 70 double filaments.
Claim 9
Dependent Claim
18 words
A diaphragm as claimed in claim 1, wherein said weft threads comprise from 35 to 55 double filaments.
Claim 10
Dependent Claim
24 words
A diaphragm as claimed in claim 1, wherein said warp threads and said weft threads have a denier of from 280 to 1100 dtex.
Claim 11
Dependent Claim
24 words
A diaphragm as claimed in claim 1, wherein said diaphragm has a weight per unit area of from 200 to 600 g/m 2 .
Claim 12
Dependent Claim
24 words
A diaphragm as claimed in claim 1, wherein said diaphragm has a weight per unit area of from 300 to 500 g/m 2 .
Claim 13
Dependent Claim
24 words
A diaphragm as claimed in claim 1, wherein said diaphragm has a weight per unit area of from 350 to 400 g/m 2 .
Claim 14
Dependent Claim
29 words
A diaphragm as claimed in claim 1, wherein said diaphragm has a linen rib weave with from 4 to 28 weft threads/cm and from 25 to 100 warp threads/cm.
Claim 15
Dependent Claim
18 words
A diaphragm, as claimed in claim 1, wherein said warp threads and said weft threads are fluorocarbon polymers.
Claim 16
Dependent Claim
18 words
A diaphragm as claimed in claim 1, wherein said warp threads and said weft threads are polyphenylene sulphide.
Claim 17
Dependent Claim
46 words
In a process for the electrolysis of water employing aqueous solutions containing alkali metal ions, chloride ions, sulphate ions or mixtures thereof in a diaphragm electrolysis cell, the improvement comprises electrolysizing said solution in said diaphragm electrolysis cell having a diaphragm as claimed in claim 1.
Claim 18
Dependent Claim
18 words
A diaphragm as claimed in claim 14, wherein said weft threads contain less than 50 turns per meter.
Claim 19
Dependent Claim
18 words
A diaphragm as claimed in claim 14, wherein said warp threads contain less than 400 turns per meter.
Claim 20
Dependent Claim
19 words
A diaphragm as claimed in claim 14, wherein said warp threads contain from 100 to 200 turns per meter.
Claim 21
Dependent Claim
18 words
A diaphragm as claimed in claim 14, wherein said weft threads comprise from 20 to 70 individual filaments.
Claim 22
Dependent Claim
20 words
A diaphragm as claimed in claim 14, wherein said weft threads are made up of 35 to 55 individual filaments.
Claim 23
Dependent Claim
18 words
A diaphragm as claimed in claim 14, wherein said weft threads comprise from 20 to 70 double filaments.
Claim 24
Dependent Claim
18 words
A diaphragm as claimed in claim 14, wherein said weft threads comprise from 35 to 55 double filaments.
Claim 25
Dependent Claim
24 words
A diaphragm as claimed in claim 14, wherein said warp threads and said weft threads have a denier of from 280 to 1100 dtex.
Claim 26
Dependent Claim
24 words
A diaphragm as claimed in claim 14, wherein said diaphragm has a weight per unit area of from 200 to 600 g/m 2 .
Claim 27
Dependent Claim
24 words
A diaphragm as claimed in claim 14, wherein said diaphragm has a weight per unit area of from 300 to 500 g/m 2 .
Claim 28
Dependent Claim
24 words
A diaphragm as claimed in claim 14, wherein said diaphragm has a weight per unit area of from 350 to 400 g/m 2 .
Claim 29
Dependent Claim
29 words
A diaphragm as claimed in claim 14, wherein said diaphragm has a linen rib weave with from 4 to 28 weft threads/cm and from 25 to 100 warp threads/cm.
Claim 30
Dependent Claim
46 words
In a process for the electrolysis of water employing aqueous solutions containing alkali metal ions, chloride ions, sulphate ions or mixtures thereof in a diaphragm electrolysis cell, the improvement comprising electrolysizing said solution in said diaphragm electrolysis cell having a diaphragm as claimed in claim 14.
References Cited (Backward Citations)
US2942327A
Cited
US4432859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |