US3775283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell including bipolar electrodes having two spaced chambers in each electrode for feeding and withdrawing electrolyte from the cell
Assignee: BASF SE
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Filing: 1971-07-29
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Granted: 1973-11-27
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Expires: 1991-07-29
Abstract
Abstract Bipolar electrodes having two chambers for inflow and outflow of the reaction mixture to be electrolyzed. The chambers are separated from each other by a distance which is considerably larger than their width and the inlets and outlets are on the same side of the electrode. Electrodes of this kind are suitable, for example, for the Kolbe synthesis of dicarboxylic esters from dicarboxylic half-esters. Such esters are useful as plasticizers.
Inventors
- 👤 W Eisele
- 👤 H Nohe
- 👤 Ammon H Von
- 👤 F Beck
- 👤 H Suter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:26
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B3/00; C25B3/20; C25B3/29; C25B11/02; C25B11/042; C25B11/046; C25B3/01; C25B3/07
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
A bipolar electrode as claimed in claim 1, wherein the said additional openings are provided in the cathode plate of the electrode.
Claim 2
Dependent Claim
19 words
A bipolar electrode as set forth in claim 1 wherein the chambers are from 30 to 70 cm apart.
Claim 3
Dependent Claim
58 words
A bipolar electrode as set forth in claim 1 wherein the two electrode plates are connected by partitioning members dividing the space between them into a pair of chambers at opposite ends of the plates and a central chamber between the pair of chambers, the central chamber being provided with an inlet and outlet for a heat-exchange medium.
Claim 4
Dependent Claim
15 words
An electrolytic cell comprising at least two bipolar electrodes as set forth in claim 1.
Claim 5
Dependent Claim
23 words
An electrolytic cell as set forth in claim 5 wherein the gap between adjacent bipolar electrodes is from 0.2 to 1.0 mm wide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |