US2647925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing monosulfonated saturated aliphatic dicarboxylic acids
Assignee: Honeywell International Inc
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Filing: 1951-04-10
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Granted: 1953-08-04
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Expires: 1971-04-10
Abstract
No abstract record available.
Inventors
- 👤 Everett E Gilbert
- 👤 Silvio L Giolito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:02
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR PREPARING MONOSULFONATES OF SATURATED ALIPHATIC DICARBOXYLIC ACIDS HAVING AT LEAST 4 CARBON ATOMS, WHICH COMPRISES REACTING IN THE LIQUID PHASE SUBSTANTIALLY EQUIMOLECULAR QUANTITIES OF A DICARBOXYLIC ACID AS DEFINED ABOVE, AND LIQUID SULFUR TRIOXIDE IN A TRICHLOROACETIC ACID REACTION MEDIUM AT TEMPERATURES IN THE RANGE BETWEEN ABOUT 60* C. AND THE BOILING POINT OF TRICHLOROACETIC ACID, NAMELY 197.5* C.
Claim 2
Dependent Claim
62 words
A PROCESS FOR PREPARING MONOSULFONATES OF SATURATED ALIPHATIC DICARBOXYLIC ACIDS HAVING AT LEAST 4 CARBON ATOMS, WHICH COMPRISES REACTING IN THE LIQUID PHASE SUBSTANTIALLY EQUIMOLECULAR QUANTITIES OF A DICARBOXYLIC ACID AS DEFINED ABOVE, AND LIQUID SULFUR TRIOXIDE IN A TRICHLOROACETIC ACID REACTION MEDIUM AT TEMPERATURES IN THE RANGE BETWEEN ABOUT 60* C. AND THE BOILING POINT OF TRICHLOROACETIC ACID, NAMELY 197.5* C.
References Cited (Backward Citations)
US2252401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |