Patent US3960699A successfully refreshed from Google Patents.
US3960699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self supporting electrodes for chlor-alkali cell
Assignee: BASF Corp
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Filing: 1974-12-23
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Granted: 1976-06-01
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Expires: 1994-12-23
Abstract
Abstract Segmented electrodes for use in electrolytic filter press cells obviate and reduce the problems of current distributions attributable to poor bipolar electrical connections, and electrode flatness. The electrodes are supported on the electrical boss as well as on the central barrier.
Inventors
- 👤 John J. Bortak
- 👤 Edward N. Balko
- 👤 Albert J. Schweickart
- 👤 Stephen M. Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:46
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
In a bipolar filter press cell of the type having an anode and a cathode separated by a central barrier and being electrically-mechanically connected through a boss, the improvement which comprises: the cathode comprising a plurality of segments, each segment having at least two bosses associated therewith, the anode comprising a plurality of segments, each segment having at least two bosses associated therewith, and wherein the segments are oriented such that at least one boss of each one electrode segment is connected to a boss of a different electrode segment than the other bosses on the one electrode segment.
Claim 2
Dependent Claim
99 words
In a bipolar filter press cell of the type having an anode and a cathode separated by a central barrier and being electrically-mechanically connected through a boss, the improvement which comprises: the cathode comprising a plurality of segments, each segment having at least two bosses associated therewith, the anode comprising a plurality of segments, each segment having at least two bosses associated therewith, and wherein the segments are oriented such that at least one boss of each one electrode segment is connected to a boss of a different electrode segment than the other bosses on the one electrode segment.
Claim 3
Dependent Claim
13 words
The filter press cell of claim 1 wherein each segment is substantially rectangular.
Claim 4
Dependent Claim
20 words
The filter press cell of claim 2 wherein each long edge of each segment has a substantially right angle bend.
Claim 5
Dependent Claim
24 words
The filter press cell of claim 3 wherein each bend has a predetermined distance less than or equal to the thickness of the boss.
Claim 6
Independent Claim
88 words
A method for reducing the current differentials in a bipolar filter press cell of the type having an anode and a cathode separated by a central barrier, comprising: segmenting each electrode into a plurality of segments associating at least two bosses with each electrode segment, and connecting each one segment across the central barrier to another electrode segment through the bosses such that each one segment of one electrode is connected to a boss of a different electrode segment than the other bosses on that one electrode segment.
Claim 7
Independent Claim
88 words
A method for reducing the current differentials in a bipolar filter press cell of the type having an anode and a cathode separated by a central barrier, comprising: segmenting each electrode into a plurality of segments associating at least two bosses with each electrode segment, and connecting each one segment across the central barrier to another electrode segment through the bosses such that each one segment of one electrode is connected to a boss of a different electrode segment than the other bosses on that one electrode segment.
Claim 8
Dependent Claim
11 words
The method of claim 5 wherein each segment is substantially rectangular.
Claim 9
Dependent Claim
18 words
The method of claim 6 wherein each long edge of each segment has a substantially right angle bend.
Claim 10
Dependent Claim
22 words
The method of claim 7 wherein each bend has a predetermined distance less than or equal to the thickness of the boss.
References Cited (Backward Citations)
US2682505A
Cited
US3824173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |