US2572605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for sulfonation of organic compounds
Assignee: Monsanto Chemicals Ltd
•
Filing: 1948-04-01
•
Granted: 1951-10-23
•
Expires: 1968-04-01
Abstract
No abstract record available.
Inventors
- 👤 John K Fincke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:16
CPC Classifications
C; C07; C07B; C07B45/00; C07B45/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
IN THE PROCESS OF SULFONATION IN WHICH A STREAM OF LIQUID SO2 CONTAINIG DISSOLVED SO3 IS MIXED WITH A STREAM OF LIQUID SO2 CONTAINING A DISSOLVED HYDROCARBON WHICH CONTAINS AT LEAST ONE GROUP OF THE TYPE: -CH=CH-, WHEREBY SAID HYDROCARBON IS SULFONATED AND HEAT OF SULFONATION IS LIBERATED, THE STEP OF FLOWING SAID MIXED STREAMS THROUGH A NOZZLE INTO A ZONE OF LOWER PRESSURE, COMPLETE EVAPORATION OF LIQUID SO2 OCCURRING WITHIN SAID NOZZLE SOLELY BY MEANS OF SAID HEAT OF SULFONATION, THE PRESSURE DROP
References Cited (Backward Citations)
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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) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |