Patent US2711187A successfully refreshed from Google Patents.
US2856359A
Expired / Lapsed
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Superbasic alkaline earth metal sulfonates
Assignee: Texaco Inc
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Filing: 1956-07-20
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Granted: 1958-10-14
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Expires: 1976-07-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Schlicht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:21
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A PROCESS FOR PREPARING SUPERBASIC ALKALINE EARTH METAL SULFONATES BY HEATING A MIXTURE CONTAINING AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF OILSOLUBLE HYDROCARBYL SULFONIC ACIDS AND ALKALINE EARTH METAL SALTS THEREOF, A BASICALLY-REACTING ALKALINE EARTH METAL COMPOUND, AND A PROMOTER SUBSTANCE AND NEUTRALIZING RESIDUAL ALKALINITY IN THE RESULTING HEATED MIXTURE WITH AN ACIDIC ANHYDRIDE GAS, THE IMPROVEMENT WHICH COMPRISES USING AS THE SPECIFIC PROMOTER SUBSTANCE 0.1 TO 0.5 GRAM MOL OF A SECONDARY ARYL HYDROCARBYL AMINE PER EQUIVALENT OF SULFONIC ACID IN SAID MIXTURE.
Claim 2
Dependent Claim
88 words
IN A PROCESS FOR PREPARING SUPERBASIC ALKALINE EARTH METAL SULFONATES BY HEATING A MIXTURE CONTAINING AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF OILSOLUBLE HYDROCARBYL SULFONIC ACIDS AND ALKALINE EARTH METAL SALTS THEREOF, A BASICALLY-REACTING ALKALINE EARTH METAL COMPOUND, AND A PROMOTER SUBSTANCE AND NEUTRALIZING RESIDUAL ALKALINITY IN THE RESULTING HEATED MIXTURE WITH AN ACIDIC ANHYDRIDE GAS, THE IMPROVEMENT WHICH COMPRISES USING AS THE SPECIFIC PROMOTER SUBSTANCE 0.1 TO 0.5 GRAM MOL OF A SECONDARY ARYL HYDROCARBYL AMINE PER EQUIVALENT OF SULFONIC ACID IN SAID MIXTURE.
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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |