US3033834A
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: 1962-05-08
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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
2026-10-24 22:29
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/36; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR SULFONATION OF ALKENYLAROMATIC RESINS WITH SULFURIC ACID BY MIXING TOGETHER AS THE ONLY STARTING MATERIALS SULFURIC ACID OF FROM 90 TO 100 PERCENT STRENGTH, A SOLUTION OF FROM 1 TO 25 PERCENT BY WEIGHT OF THE SOLUTION OF AN ALKENYLAROMATIC RESIN IN AN ANHYDROUS LIQUID CHLORINATED ALIPHATIC HYDROCARBON, AND A COLLOIDAL PARTICLE SUSPENDING AGENT, THE STARTING ALKENYLAROMATIC RESIN BEING A SOLID ADDITION POLYMER OF ETHYLENICALLY UNSATURATED MONOMERS AT LEAST 50 PERCENT BY WEIGHT OF WHICH HAS THE GENERAL FORMULA
Claim 2
Dependent Claim
82 words
A PROCESS FOR SULFONATION OF ALKENYLAROMATIC RESINS WITH SULFURIC ACID BY MIXING TOGETHER AS THE ONLY STARTING MATERIALS SULFURIC ACID OF FROM 90 TO 100 PERCENT STRENGTH, A SOLUTION OF FROM 1 TO 25 PERCENT BY WEIGHT OF THE SOLUTION OF AN ALKENYLAROMATIC RESIN IN AN ANHYDROUS LIQUID CHLORINATED ALIPHATIC HYDROCARBON, AND A COLLOIDAL PARTICLE SUSPENDING AGENT, THE STARTING ALKENYLAROMATIC RESIN BEING A SOLID ADDITION POLYMER OF ETHYLENICALLY UNSATURATED MONOMERS AT LEAST 50 PERCENT BY WEIGHT OF WHICH HAS THE GENERAL FORMULA
References Cited (Backward Citations)
US2604461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |