US2743288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of monosulfonated carboxylic acids and their esters
Assignee: Tennessee Corp
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Filing: 1953-06-24
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Granted: 1956-04-24
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Expires: 1973-06-24
Abstract
No abstract record available.
Inventors
- 👤 Walter H C Rueggeberg
- 👤 Thomas W Sauls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:00
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE PRODUCTION OF MONOSULFONATED UNSATURATED ALIPHATIC CARBOXYLIC ACIDS WHICH COMPRISES SULFONATING AN UNSATURATED ALIPHATIC CARBOXYLIC ACID WITH SULFUR TRIOXIDE DISSOLVED IN LIQUID SULFUR DIOXIDE PER MOLE PROPORTION OF 1.0-1.25 MOLES OF SULFUR TRIOXIDE PER MOLE OF UNSATURATED ACID, AND SEPARATING THE SULFUR DIOXIDE FROM THE SULFONATED MATERIAL COMPRISING FREE CARBOXYLIC ACID CHARACTERIZED BY RETENTION OF AT LEAST 40% OF THE UNSATURATION PRIOR TO SULFONATION AND BY APPROXIMATELY ONE MOLE OF ORGANICALLY COMBINED SULFUR TRIOXIDE PER MOLE OF ACOD.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE PRODUCTION OF MONOSULFONATED UNSATURATED ALIPHATIC CARBOXYLIC ACIDS WHICH COMPRISES SULFONATING AN UNSATURATED ALIPHATIC CARBOXYLIC ACID WITH SULFUR TRIOXIDE DISSOLVED IN LIQUID SULFUR DIOXIDE PER MOLE PROPORTION OF 1.0-1.25 MOLES OF SULFUR TRIOXIDE PER MOLE OF UNSATURATED ACID, AND SEPARATING THE SULFUR DIOXIDE FROM THE SULFONATED MATERIAL COMPRISING FREE CARBOXYLIC ACID CHARACTERIZED BY RETENTION OF AT LEAST 40% OF THE UNSATURATION PRIOR TO SULFONATION AND BY APPROXIMATELY ONE MOLE OF ORGANICALLY COMBINED SULFUR TRIOXIDE PER MOLE OF ACOD.
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) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |