US2544562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering aldehydes and ketones
Assignee: Stanolind Oil and Gas Co
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Filing: 1947-07-18
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Granted: 1951-03-06
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Expires: 1967-07-18
Abstract
No abstract record available.
Inventors
- 👤 Vesta F Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:18
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A PROCESS FOR THE RECOVERY OF A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES FROM A MIXTURE COMPRISED THEREOF, THE STEPS WHICH COMPRISE ADJUSTING THE PH OF AN AQUEOUS SOLUTION OF A WATER SOLUBLE BISULFITE TO A VALUE BETWEEN ABOUT 5 AND 8, SAID SOLUTION CONSISTING ESSENTIALLY OF A MIXTURE OF SULFITE AND BISULFITE IONS, THEREAFTER MIXING SAID AQUEOUS SOLUTION WITH SAID MIXTURE CONTAINING SAID CARBONYL COMPOUND TO FORM THE CORRESPONDING BISULFITE ADDUCT OF SAID CARBONYL COMPOUND, AND HEATING THE RESULTING MIXTURE TO A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF SAID ADDUCT WITHOUT THE ADDITION OF ALKALI TO SAID MIXTURE SUBSEQUENT TO THE FORMATION OF SAID BISULFITE ADDUCT.
Claim 2
Dependent Claim
113 words
IN A PROCESS FOR THE RECOVERY OF A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES FROM A MIXTURE COMPRISED THEREOF, THE STEPS WHICH COMPRISE ADJUSTING THE PH OF AN AQUEOUS SOLUTION OF A WATER SOLUBLE BISULFITE TO A VALUE BETWEEN ABOUT 5 AND 8, SAID SOLUTION CONSISTING ESSENTIALLY OF A MIXTURE OF SULFITE AND BISULFITE IONS, THEREAFTER MIXING SAID AQUEOUS SOLUTION WITH SAID MIXTURE CONTAINING SAID CARBONYL COMPOUND TO FORM THE CORRESPONDING BISULFITE ADDUCT OF SAID CARBONYL COMPOUND, AND HEATING THE RESULTING MIXTURE TO A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF SAID ADDUCT WITHOUT THE ADDITION OF ALKALI TO SAID MIXTURE SUBSEQUENT TO THE FORMATION OF SAID BISULFITE ADDUCT.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |