Patent US2517013A successfully refreshed from Google Patents.
US2517013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of aldol
Assignee: Celanese Corp
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Filing: 1946-02-01
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Granted: 1950-08-01
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Expires: 1966-02-01
Abstract
No abstract record available.
Inventors
- 👤 Miller Samuel Aron
- 👤 Hammond Alan Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:28
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
PROCESS FOR THE MANUFACTURE OF ACETALDOL, WHICH COMPRISES INTIMATELY MIXING ACETALDEHYE CONTAINING LESS THAN 0.1% OF ACID (CALCULATED AS ACETIC ACID) WITH AN ALKALI METAL HYDROXIDE IN AMOUNT SUCH THAT AFTER ANY ACID HAS BEEN NEUTRALIZED THE AMOUNT OF ALKALI METAL HYDROXIDE IN THE MIXTURE (CALCULATED AS SODIUM HYDROXIDE) IS 0.15 TO 0.25% OF THE WEIGHT OF THE ACETALDEHYDE, KEEPING THE MIXTURE IN THE ABSENCE OF FREE OXYGEN AT A TEMPERATURE OF 40 TO 50*C. FOR A PERIOD LESS THAN 6 HOURS BUT LONG ENOUGH TO GIVE A PRODUCT IN WHICH THE RATIO OF THE AMOUNT OF ACETALDOL TO THAT OF ACETALDEHYDE IS HIGHER THAN 1:2, AND THEN AT A TEMPERATURE OF 5 TO 30*C. FOR AT LEAST 15 HOURS.
Claim 2
Dependent Claim
120 words
PROCESS FOR THE MANUFACTURE OF ACETALDOL, WHICH COMPRISES INTIMATELY MIXING ACETALDEHYE CONTAINING LESS THAN 0.1% OF ACID (CALCULATED AS ACETIC ACID) WITH AN ALKALI METAL HYDROXIDE IN AMOUNT SUCH THAT AFTER ANY ACID HAS BEEN NEUTRALIZED THE AMOUNT OF ALKALI METAL HYDROXIDE IN THE MIXTURE (CALCULATED AS SODIUM HYDROXIDE) IS 0.15 TO 0.25% OF THE WEIGHT OF THE ACETALDEHYDE, KEEPING THE MIXTURE IN THE ABSENCE OF FREE OXYGEN AT A TEMPERATURE OF 40 TO 50*C. FOR A PERIOD LESS THAN 6 HOURS BUT LONG ENOUGH TO GIVE A PRODUCT IN WHICH THE RATIO OF THE AMOUNT OF ACETALDOL TO THAT OF ACETALDEHYDE IS HIGHER THAN 1:2, AND THEN AT A TEMPERATURE OF 5 TO 30*C. FOR AT LEAST 15 HOURS.
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) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |