Patent US3787299A successfully refreshed from Google Patents.
US3787299A
Expired / Lapsed
US
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Electrolytic condensation of carboxylic acids
Assignee: BASF SE
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Filing: 1971-03-22
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Granted: 1974-01-22
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Expires: 1991-03-22
Abstract
Abstract Process for the electrochemical condensation of carboxylic acids in a solvent, in which the electrolyte is caused to flow at a rate of from 0.05 to 2 m/sec between pairs of electrodes which are impermeable to liquids and are spaced from 0.1 to 2 mm apart.
Inventors
- 👤 H Nohe
- 👤 F Beck
- 👤 J Haufe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:40
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/29; C25B3/01; C25B3/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
A process as claimed in claim 1, wherein methanol is used as solvent.
Claim 2
Dependent Claim
20 words
A process as claimed in claim 1 wherein the distance between the paired electrodes is from 0.3 to 0.8 mm.
Claim 3
Dependent Claim
23 words
A process as claimed in claim 1 wherein the electrolyte is caused to flow at a rate of from 0.1 to 0.7 m/sec.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1 wherein more than 90 percent of the starting compound is converted.
Claim 5
Dependent Claim
12 words
A process as claimed in claim 1 which is carried out continuously.
Claim 6
Dependent Claim
22 words
A process as claimed in claim 1 wherein the degree of neutralization of the carboxylic acid is less than 10 percent molar.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |