US3072619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving stability of aromatic sulfonates
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1959-12-21
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Granted: 1963-01-08
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Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Albin F Turbak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:25
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD FOR STABILIZING A SUBSTANTIALLY CROSS-LINK FREE SULFONATED ALKENYL AROMATIC POLYMER TO THERMAL AGING, SAID POLYMER BEING PRECIPITATED FROM AN SO3-CONTAINING SULFONATION REACTION MIXTURE IN THE FORM OF A SOLID SULFONIC ACID, WHICH COMPRISES WASHING SAID ACID WITH A HALOGENATED HYDROCARBON AFTER SEPARATING SAID ACID FROM THE REACTION MIXTURE AND BEFORE NEUTRALIZING THE ACID.
Claim 2
Independent Claim
55 words
A METHOD FOR STABILIZING A SUBSTANTIALLY CROSS-LINK FREE SULFONATED ALKENYL AROMATIC POLYMER TO THERMAL AGING, SAID POLYMER BEING PRECIPITATED FROM AN SO3-CONTAINING SULFONATION REACTION MIXTURE IN THE FORM OF A SOLID SULFONIC ACID, WHICH COMPRISES WASHING SAID ACID WITH A HALOGENATED HYDROCARBON AFTER SEPARATING SAID ACID FROM THE REACTION MIXTURE AND BEFORE NEUTRALIZING THE ACID.
References Cited (Backward Citations)
US2763634A
Cited
US2764561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |