US2838564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of surface active materials
Assignee: Tennessee Corp
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Filing: 1956-04-25
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Granted: 1958-06-10
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Expires: 1976-04-25
Abstract
No abstract record available.
Inventors
- 👤 Samuei L Norwood
- 👤 Thomas W Sauls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:42
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR THE PRODUCTION OF SURFACE ACTIVE PRODUCTS WHICH COMPRISES ADDING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE TRIMER AND TETRAMER OVER A PERIOD OF ONE TO THREE HOURS TO A MIXTURE OF AN AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF BENZENE AND TOLUENE WITH 95-96% SULFURIC ACID AS AN ALKYLATION CATALYST, MAINTAINING THE TEMPERATURE OF THE MASS BETWEEN 0*C. AND 10*C. DURING THE ALKYLATION, THEN ADDING A SULFONATING AGENT TO THE MASS COMPRISING SAID OLEFIN, AROMATIC COMPOUND, AND SULFURIC ACID CATALYST, AND RECOVERING THE SULFONATED MATERIAL.
Claim 2
Dependent Claim
91 words
A PROCESS FOR THE PRODUCTION OF SURFACE ACTIVE PRODUCTS WHICH COMPRISES ADDING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE TRIMER AND TETRAMER OVER A PERIOD OF ONE TO THREE HOURS TO A MIXTURE OF AN AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF BENZENE AND TOLUENE WITH 95-96% SULFURIC ACID AS AN ALKYLATION CATALYST, MAINTAINING THE TEMPERATURE OF THE MASS BETWEEN 0*C. AND 10*C. DURING THE ALKYLATION, THEN ADDING A SULFONATING AGENT TO THE MASS COMPRISING SAID OLEFIN, AROMATIC COMPOUND, AND SULFURIC ACID CATALYST, AND RECOVERING THE SULFONATED MATERIAL.
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |