US3251868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonation of saturated fatty acid esters of polyvalent alcohols
Assignee: Henkel AG and Co KGaA
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Filing: 1962-05-15
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Granted: 1966-05-17
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Expires: 1982-05-15
Abstract
No abstract record available.
Inventors
- 👤 Stein Werner
- 👤 Weiss Herbert
- 👤 Koch Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:38
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C11; C11C; C11C3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN THE PROCESS FOR THE SULFONATION OF FATTY ACID ESTERS OF POLYVALENT ALCHOHOLS WHICH CONTAIN A SUBSTANTIALLY SATURATED UNSUBSTITUTED FATTY ACID RADICAL HAVING FROM 6-28 CARBON ATOMS, IN WHICH THE ESTER IS REACTED WITH AN EXCESS OF GASEOUS SO2, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE SULFONATION WITH THE ESTER IN ADMIXTURE WITH ABOUT 20 TO 85% BY WEIGHT OF AN ESTER OF A FATTY ACID HAVING FROM 6-28 CARBON ATOMS WITH A MONOVALENT ALCOHOL.
Claim 2
Dependent Claim
74 words
IN THE PROCESS FOR THE SULFONATION OF FATTY ACID ESTERS OF POLYVALENT ALCHOHOLS WHICH CONTAIN A SUBSTANTIALLY SATURATED UNSUBSTITUTED FATTY ACID RADICAL HAVING FROM 6-28 CARBON ATOMS, IN WHICH THE ESTER IS REACTED WITH AN EXCESS OF GASEOUS SO2, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE SULFONATION WITH THE ESTER IN ADMIXTURE WITH ABOUT 20 TO 85% BY WEIGHT OF AN ESTER OF A FATTY ACID HAVING FROM 6-28 CARBON ATOMS WITH A MONOVALENT ALCOHOL.
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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |