US2806055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of alkaryl sulfonates
Assignee: ConocoPhillips Co
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Filing: 1955-03-14
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Granted: 1957-09-10
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 George C Feighner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:07
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; C07C303/44; C07C303/02; C07C303/04; C07C303/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF PRODUCING AN ALARYL SULFONATE SUBSTANTIALLY FREE OF COLOR BODIES WHICH COMPRISES REACTING AN ALKARYL HYDROCARBON WITH A SULFONATING AGEN SELECTED FROM THE CLASS CONSISTING OF SULFURIC ACID, OLEUM, CHLOROSULFONIC ACID, AND SULFUR TRIOXIDE UNDER SULFONATING CONDITIONS, SEPARATING THE SPENT SULFONATING AGENT FROM THE RESULTING ALKARYL SOLFONIC ACID, BLEACHING SAID SULFONIC ACID BY TREATMENT WITH .3 TO 3 WEIGHT PER CENT OF HYDROGEN PEROXIDE BASED UPON THE WEIGHT OF SAID SULFONIC ACID, NEUTRALIZING SAID SULFONIC ACID, AND THEN RECOVERING THE ALKARYL SULFONATE.
Claim 2
Independent Claim
84 words
A METHOD OF PRODUCING AN ALARYL SULFONATE SUBSTANTIALLY FREE OF COLOR BODIES WHICH COMPRISES REACTING AN ALKARYL HYDROCARBON WITH A SULFONATING AGEN SELECTED FROM THE CLASS CONSISTING OF SULFURIC ACID, OLEUM, CHLOROSULFONIC ACID, AND SULFUR TRIOXIDE UNDER SULFONATING CONDITIONS, SEPARATING THE SPENT SULFONATING AGENT FROM THE RESULTING ALKARYL SOLFONIC ACID, BLEACHING SAID SULFONIC ACID BY TREATMENT WITH .3 TO 3 WEIGHT PER CENT OF HYDROGEN PEROXIDE BASED UPON THE WEIGHT OF SAID SULFONIC ACID, NEUTRALIZING SAID SULFONIC ACID, AND THEN RECOVERING THE ALKARYL SULFONATE.
References Cited (Backward Citations)
US1842884A
Cited
US2333830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |