US3158632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-sulfonation of saturated fatty acids and their derivatives
Assignee: Henkel & Cia G M B H
•
Filing: 1962-05-15
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Granted: 1964-11-24
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Expires: 1982-05-15
Abstract
No abstract record available.
Inventors
- 👤 Blaser Bruno
- 👤 Stein Werner
- 👤 Weiss Herbert
- 👤 Koch Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:10
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN THE PROCESS FOR THE A-SULFONATION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS, FATTY ACID ESTERS, AND MIXTURES THEREOF HAVING A SUBSTANTIALLY SATURATED FATTY ACID RADICAL WITH 6 TO 28 CARBON ATOMS AND BEING SUBSTANTIALLY FREE OF ALCOHOLIC HYDROXYL GROUPS, THE IMPROVEMENT WHICH COMPRISES INITIALLY INTRODUCING ABOUT 1.1-1.8 MOLS OF GASEOUS SO3 PER MOL OF FATTY ACID RADICAL TO BE SULFONATED INTO SAID GROUP MEMBER AT A TEMPERATURE BELOW THE TEMPERATURE OF EFFECTIVE SULFONATION, THEREAFTER RAISING THE TEMPERATURE TO ABOVE THE TEMPERATURE OF EFFECTIVE SULFONATIONS BUT NOT IN EXCESS OF ABOUT 70*C. MAINTAINING SUCH TEMPERATURE UNTIL AT LEAST 50% OF SAID GROUP MEMBER HAS BEEN SULFONATED AND THEREAFTER INCREASING THE TEMPERATURE TO AT LEAST 75*C. TO SUBSTANTIALLY COMPLETE THE SULFONATION.
Claim 2
Dependent Claim
124 words
IN THE PROCESS FOR THE A-SULFONATION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS, FATTY ACID ESTERS, AND MIXTURES THEREOF HAVING A SUBSTANTIALLY SATURATED FATTY ACID RADICAL WITH 6 TO 28 CARBON ATOMS AND BEING SUBSTANTIALLY FREE OF ALCOHOLIC HYDROXYL GROUPS, THE IMPROVEMENT WHICH COMPRISES INITIALLY INTRODUCING ABOUT 1.1-1.8 MOLS OF GASEOUS SO3 PER MOL OF FATTY ACID RADICAL TO BE SULFONATED INTO SAID GROUP MEMBER AT A TEMPERATURE BELOW THE TEMPERATURE OF EFFECTIVE SULFONATION, THEREAFTER RAISING THE TEMPERATURE TO ABOVE THE TEMPERATURE OF EFFECTIVE SULFONATIONS BUT NOT IN EXCESS OF ABOUT 70*C. MAINTAINING SUCH TEMPERATURE UNTIL AT LEAST 50% OF SAID GROUP MEMBER HAS BEEN SULFONATED AND THEREAFTER INCREASING THE TEMPERATURE TO AT LEAST 75*C. TO SUBSTANTIALLY COMPLETE THE SULFONATION.
References Cited (Backward Citations)
US2878281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |