US2616936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sulfonation with sulfur trioxide
Assignee: Universal Oil Products Co
•
Filing: 1949-04-12
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Granted: 1952-11-04
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Expires: 1969-04-12
Abstract
No abstract record available.
Inventors
- 👤 Howard E Mammen
- 👤 George L Hervert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:19
CPC Classifications
C; C07; C07B; C07B45/00; C07B45/02; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C07C303/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A SULFONATION PROCESS WHEREIN A SULFONATABLE ORGANIC COMPOUND IS REACTED IN A SULFONATION ZONE WITH SULFUR TRIOXIDE, THE METHOD OF SUPPLYING SULFUR TRIOXIDE TO SAID ZONE WHICH COMPRISES MAINTAINING IN A PICK-UP ZONE APART FROM SAID SULFONATION ZONE A MASS OF A SULFONATING AGENT SELECTED FROM THE GROUP CONSISTING OF LIQUID SULFUR TRIOXIDE AND SOLID SULFUR TRIOXIDE,PASSING THROUGH SAID MASS IS THE PICK-UP ZONE AN INERT PARAFFINIC HYDROCARBON CONTAINING FROM 3 TO 8 CARBON ATOMS PER MOLECULE AT A TEMPERATURE BELOW ABOUT 30* C. TO ENTRAIN A PORTION OF THE SULFUR TRIOXIDE IN THE PARAFFINIC HYDROCARBON, REMOVING THE RESULTANT MIXTURE OF PARAFFINIC HYDROCARBON AND SULFUR TRIOXIDE FROM THE PICK-UP ZONE OF INTRODUCING THE SAME TO SAID SULFONATION ZONE.
Claim 2
Dependent Claim
119 words
IN A SULFONATION PROCESS WHEREIN A SULFONATABLE ORGANIC COMPOUND IS REACTED IN A SULFONATION ZONE WITH SULFUR TRIOXIDE, THE METHOD OF SUPPLYING SULFUR TRIOXIDE TO SAID ZONE WHICH COMPRISES MAINTAINING IN A PICK-UP ZONE APART FROM SAID SULFONATION ZONE A MASS OF A SULFONATING AGENT SELECTED FROM THE GROUP CONSISTING OF LIQUID SULFUR TRIOXIDE AND SOLID SULFUR TRIOXIDE,PASSING THROUGH SAID MASS IS THE PICK-UP ZONE AN INERT PARAFFINIC HYDROCARBON CONTAINING FROM 3 TO 8 CARBON ATOMS PER MOLECULE AT A TEMPERATURE BELOW ABOUT 30* C. TO ENTRAIN A PORTION OF THE SULFUR TRIOXIDE IN THE PARAFFINIC HYDROCARBON, REMOVING THE RESULTANT MIXTURE OF PARAFFINIC HYDROCARBON AND SULFUR TRIOXIDE FROM THE PICK-UP ZONE OF INTRODUCING THE SAME TO SAID SULFONATION ZONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |