US3256303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonation of fatty acids and their esters
Assignee: Henkel AG and Co KGaA
•
Filing: 1962-05-15
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Granted: 1966-06-14
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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
2026-11-03 15:01
CPC Classifications
C; C11; C11C; C11C3/00; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN THE PROCESS FOR THE A SULFONATION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED SATURATED FATTY ACIDS, UNSUBSTITUTED SATURATED FATTY ACID ESTERS, AND MIXTURES THEREOF CONTAINING 6 TO 28 C ATOMS IN THE FATTY ACID RADICAL BY REACTION WITH GASEOUS SULFUR TRIOXIDE, THE IMPROVEMENT WHICH COMPRISES INITIALLY CONTACTING SAID GROUP MEMBER AT A TEMPERATURE BETWEEN ABOUT 30 AND 70*C. WITHABOUT 65-90% OF A 1.1-1.8 MOLAR QUANTITY OF GASEOUS SULFUR TRIOXIDE BASED ON THE FATTY ACID RADICALS TO BE SULFONATED IN AT LEAST ONE FIRST SULFONATION STEP, AND THEREAFTER CONTACTING SAID GROUP MEMBER IN AT LEAST ONE ADDITIONAL SULFONATION STEP WITH THE BALANCE OF SAID MOLAR QUANTITY OF SULFUR DIOXIDE AT A TEMPERATURE BETWEEN ABOUT 75-95*C.
Claim 2
Dependent Claim
118 words
IN THE PROCESS FOR THE A SULFONATION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED SATURATED FATTY ACIDS, UNSUBSTITUTED SATURATED FATTY ACID ESTERS, AND MIXTURES THEREOF CONTAINING 6 TO 28 C ATOMS IN THE FATTY ACID RADICAL BY REACTION WITH GASEOUS SULFUR TRIOXIDE, THE IMPROVEMENT WHICH COMPRISES INITIALLY CONTACTING SAID GROUP MEMBER AT A TEMPERATURE BETWEEN ABOUT 30 AND 70*C. WITHABOUT 65-90% OF A 1.1-1.8 MOLAR QUANTITY OF GASEOUS SULFUR TRIOXIDE BASED ON THE FATTY ACID RADICALS TO BE SULFONATED IN AT LEAST ONE FIRST SULFONATION STEP, AND THEREAFTER CONTACTING SAID GROUP MEMBER IN AT LEAST ONE ADDITIONAL SULFONATION STEP WITH THE BALANCE OF SAID MOLAR QUANTITY OF SULFUR DIOXIDE AT A TEMPERATURE BETWEEN ABOUT 75-95*C.
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |