US2800503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of neutral or basic organic sulfonates
Assignee: Pure Oil Co
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Filing: 1954-12-06
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Granted: 1957-07-23
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Expires: 1974-12-06
Abstract
No abstract record available.
Inventors
- 👤 Gifford W Crosby
- 👤 Le Rol E Hutchings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:03
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; C07C303/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD FOR RECOVERING ORGANIC SULFONATES FROM A NEUTRALIZED SULFONATION REACTION MASS CONTAINING UNSULFONATED RESIDUE WHICH COMPRISES CONTACTING SAID MASS AT A TEMPERATURE OF ABOUT 20*-150*F. WITH AN ORGANIC PRECIPITANT SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC MONO- AND DICHLORIDES, ACYCLIC AND CYCLIC POLYETHERS, AND CHLORINATED ETHERS IN THE VOLUME RATIO OF PRECIPITANT TO SULFONATION REACTION MASS OF ALBOUT 3-20:1, WHEREBY SAID REACTION MASS IS SEPARATED INTO A PRECIPITANTCONTAINING LIQUID PHASE AND A SULFONATE-CONTAINING SEMISOLID PHASE SUBSTANTIALLY FREE FROM UNSULFONATED RESIDUE.
Claim 2
Independent Claim
81 words
A METHOD FOR RECOVERING ORGANIC SULFONATES FROM A NEUTRALIZED SULFONATION REACTION MASS CONTAINING UNSULFONATED RESIDUE WHICH COMPRISES CONTACTING SAID MASS AT A TEMPERATURE OF ABOUT 20*-150*F. WITH AN ORGANIC PRECIPITANT SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC MONO- AND DICHLORIDES, ACYCLIC AND CYCLIC POLYETHERS, AND CHLORINATED ETHERS IN THE VOLUME RATIO OF PRECIPITANT TO SULFONATION REACTION MASS OF ALBOUT 3-20:1, WHEREBY SAID REACTION MASS IS SEPARATED INTO A PRECIPITANTCONTAINING LIQUID PHASE AND A SULFONATE-CONTAINING SEMISOLID PHASE SUBSTANTIALLY FREE FROM UNSULFONATED RESIDUE.
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) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |