US3056766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonation of alkenylaromatic resins with sulfuric acid
Assignee: Dow Chemical Co
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Filing: 1958-09-02
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Granted: 1962-10-02
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Expires: 1978-09-02
Abstract
No abstract record available.
Inventors
- 👤 Harold H Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:54
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/36; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A METHOD WHEREIN A BENEZENE-SOLUBLE SOLID ALKENYL AROMATIC RESIN IS DISSOLVED IN AN ANYDROUS LIQUID CHLORINATED ALIPHATIC HYDROCARBON AND SULFATED BY REACTION WITH SULFURIC ACID TO FORM A RESIN SULFONATED IN A REACTION MIXTURE CONSISTING OF THE ALKENYL AROMATIC RESIN, THE CHLORINATED ALIPHATIC HYDROCARBON, THE SULFURIC ACID, AND THE PRODUCTS OF THE RESULTING SULFONATION REACTION, AND WHEREIN THE STARTING SOLID ALKENYL AROMATIC RESIN CONSISTS OF AN ADDITION POLYMER OF ETHYLENICALLY UNSATURATED MONOMERS AT LEAST 50 PERCENT BY WEIGHT OF WHICH HAS THE GENERAL FORMULA:
Claim 2
Dependent Claim
85 words
IN A METHOD WHEREIN A BENEZENE-SOLUBLE SOLID ALKENYL AROMATIC RESIN IS DISSOLVED IN AN ANYDROUS LIQUID CHLORINATED ALIPHATIC HYDROCARBON AND SULFATED BY REACTION WITH SULFURIC ACID TO FORM A RESIN SULFONATED IN A REACTION MIXTURE CONSISTING OF THE ALKENYL AROMATIC RESIN, THE CHLORINATED ALIPHATIC HYDROCARBON, THE SULFURIC ACID, AND THE PRODUCTS OF THE RESULTING SULFONATION REACTION, AND WHEREIN THE STARTING SOLID ALKENYL AROMATIC RESIN CONSISTS OF AN ADDITION POLYMER OF ETHYLENICALLY UNSATURATED MONOMERS AT LEAST 50 PERCENT BY WEIGHT OF WHICH HAS THE GENERAL FORMULA:
References Cited (Backward Citations)
US2604461A
Cited
US2763634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |