US2704295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic hydrocarbon sulfonation
Assignee: Honeywell International Inc
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Filing: 1952-07-11
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Granted: 1955-03-15
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Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 Everett E Gilbert
- 👤 Silvio L Giolito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:26
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR SULFONATING MONONUCLEAR AROMATIC HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF BENZENE, CHLOROBENZENE, TOLUENE AND THE XYLENES WITH SULFUR TRIOXIDE IN WHICH SULFONE FORMATION IS MINIMIZED, THE STEPS WHICH COMPRISES CARRYING OUT THE SULFONATION REACTION WHOLLY IN THE LIQUID PHASE IN THE PRESENCE OF A SMALL QUANTITY, AT LEAST ABOUT 2% BY WEIGHT BASED ON THE WEIGHT OF THE HYDROCARBON, OF AN INHIBITOR SELECTED FROM THE GROUP CONSISTING OF SATURATED LOWER ALIPHATIC ACIDS, CONSISTING FROM 2 TO 8 CARBON ATOMS INCLUSIVE, THEIR PER ACIDS, THEIR ANHYDRIDES AND REACTION PRODUCTS OF THE FOREGOING WITH SULFUR TRIOXIDE.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR SULFONATING MONONUCLEAR AROMATIC HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF BENZENE, CHLOROBENZENE, TOLUENE AND THE XYLENES WITH SULFUR TRIOXIDE IN WHICH SULFONE FORMATION IS MINIMIZED, THE STEPS WHICH COMPRISES CARRYING OUT THE SULFONATION REACTION WHOLLY IN THE LIQUID PHASE IN THE PRESENCE OF A SMALL QUANTITY, AT LEAST ABOUT 2% BY WEIGHT BASED ON THE WEIGHT OF THE HYDROCARBON, OF AN INHIBITOR SELECTED FROM THE GROUP CONSISTING OF SATURATED LOWER ALIPHATIC ACIDS, CONSISTING FROM 2 TO 8 CARBON ATOMS INCLUSIVE, THEIR PER ACIDS, THEIR ANHYDRIDES AND REACTION PRODUCTS OF THE FOREGOING WITH SULFUR TRIOXIDE.
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) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |