US2764576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of water-soluble sulfonated styrene polymers
Assignee: Henkel AG and Co KGaA
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Filing: 1953-07-14
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Granted: 1956-09-25
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Expires: 1973-07-14
Abstract
No abstract record available.
Inventors
- 👤 Blaser Bruno
- 👤 Rugenstein Malte
- 👤 Tischbirek Guenther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:21
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/36; C08F2800/00; C08F2800/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
METHOD FOR THE PREPARING OF WATER-SOLUBLE SULFONATED STYRENE POLYMERS, WHICH COMPRISES CONTACTING A SOLUTION OF A STYRENE POLYMER IN AN ALIPHATIC HALOGENATED HYDROCARBON WITH A SULFUR TRIOXIDE-KETONE COMPOUND, SAID SOLUTION OF STRYENE POLYMER AND SAID SULFUR TRIOXIDEKETONE COMPOUND BEING PRESENT IN AMOUNT SUFFICIENT TO FROM A RATIO OF TOTAL SULFUR TRIOXIDE TO MONOMERIC MEMBERS IN THE STYRENE POLYMER OF 1:1 TO 2:1, SAID SULFUR TRIOXIDE-KETONE COMPOUND BEING FORMED BY MIXING A LOWMOLECULAR WEIGHT, SATURATED KETONE WITH SULFUR TRIOXIDE IN THE MOLECULAR RATIO OF ABOUT 2:1 TO 1:3 WITH COOLING AND RECOVERING THE SULFONATED STYRENE POLYMER.
Claim 2
Dependent Claim
95 words
METHOD FOR THE PREPARING OF WATER-SOLUBLE SULFONATED STYRENE POLYMERS, WHICH COMPRISES CONTACTING A SOLUTION OF A STYRENE POLYMER IN AN ALIPHATIC HALOGENATED HYDROCARBON WITH A SULFUR TRIOXIDE-KETONE COMPOUND, SAID SOLUTION OF STRYENE POLYMER AND SAID SULFUR TRIOXIDEKETONE COMPOUND BEING PRESENT IN AMOUNT SUFFICIENT TO FROM A RATIO OF TOTAL SULFUR TRIOXIDE TO MONOMERIC MEMBERS IN THE STYRENE POLYMER OF 1:1 TO 2:1, SAID SULFUR TRIOXIDE-KETONE COMPOUND BEING FORMED BY MIXING A LOWMOLECULAR WEIGHT, SATURATED KETONE WITH SULFUR TRIOXIDE IN THE MOLECULAR RATIO OF ABOUT 2:1 TO 1:3 WITH COOLING AND RECOVERING THE SULFONATED STYRENE POLYMER.
References Cited (Backward Citations)
US2663700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |