US3420875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin sulfonates
Assignee: Colgate Palmolive Co
•
Filing: 1966-08-02
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Granted: 1969-01-07
•
Expires: 1986-08-02
Abstract
No abstract record available.
Inventors
- 👤 Walter Anthony Di Salyo
- 👤 Jerome Stanley Schrager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:31
CPC Classifications
C; C07; C07C; C07C309/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN THE PRODUCTION OF OLEFIN SULFONATES BY THE REACTION OF SO3 AND AN OLEFIN TO PRODUCE AN ACID MIX FOLLOWED BY AQUEOUS ALKALINE TREATMENT TO CONVERT THE ACID MIX TO AN OLEFIN SULFONATE, THE IMPROVEMENT WHICH COMPRISES FIRST NEUTRALIZING THE ACID MIX WITH AQUEOUS SODIUM HYDROXIDE WHILE MAINTAINING THE TEMPERATURE BELOW ABOUT 150*F., THE AMOUNT OF SODIUM HYDROXIDE AND WATER BEING SUCH THAT THE RESULTING BLEND HAS A PH OF AT LEAST ABOUT 12 AND HAS A VISCOSITY OF ABOUT 5,000 TO 30,000 CENTIPOISES, AND PASSING THE VISCOUS ALKALINE BLEND CONTINUSOUSLY INTO A ZONE MAINTAINED UNDER SUPERATMOSPHERIC PRESSURE IN WHICH SAID BLEND MAKES CONTACT WITH A HEATED SOLID HEAT-EXCHANGE SURFACE MAINTAINED AT A TEMPERATURE OF AT LEAST ABOUT 350*F. SO AS TO RAISE THE TEMPERATURE OF THE BLEND TO AT LEAST ABOUT 330*F., BY SAID CONTACT, WITHIN A PERIOD OF LESS THAN 5 MINUTES.
Claim 2
Dependent Claim
144 words
IN THE PRODUCTION OF OLEFIN SULFONATES BY THE REACTION OF SO3 AND AN OLEFIN TO PRODUCE AN ACID MIX FOLLOWED BY AQUEOUS ALKALINE TREATMENT TO CONVERT THE ACID MIX TO AN OLEFIN SULFONATE, THE IMPROVEMENT WHICH COMPRISES FIRST NEUTRALIZING THE ACID MIX WITH AQUEOUS SODIUM HYDROXIDE WHILE MAINTAINING THE TEMPERATURE BELOW ABOUT 150*F., THE AMOUNT OF SODIUM HYDROXIDE AND WATER BEING SUCH THAT THE RESULTING BLEND HAS A PH OF AT LEAST ABOUT 12 AND HAS A VISCOSITY OF ABOUT 5,000 TO 30,000 CENTIPOISES, AND PASSING THE VISCOUS ALKALINE BLEND CONTINUSOUSLY INTO A ZONE MAINTAINED UNDER SUPERATMOSPHERIC PRESSURE IN WHICH SAID BLEND MAKES CONTACT WITH A HEATED SOLID HEAT-EXCHANGE SURFACE MAINTAINED AT A TEMPERATURE OF AT LEAST ABOUT 350*F. SO AS TO RAISE THE TEMPERATURE OF THE BLEND TO AT LEAST ABOUT 330*F., BY SAID CONTACT, WITHIN A PERIOD OF LESS THAN 5 MINUTES.
References Cited (Backward Citations)
DE1215695B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |