US2877213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of sulfonated polymers from non-aqueous slurries
Assignee: Dow Chemical Co
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Filing: 1956-06-04
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Granted: 1959-03-10
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Expires: 1976-06-04
Abstract
No abstract record available.
Inventors
- 👤 Eichhorn Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:48
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN A METHOD FOR THE PREPARATION OF WATER-DISPERSIBLE RESIN SULFONATES WHEREIN A BENZENE-SOLUBLE THERMOPLASTIC SOLID ADDITION POLYMER CONSISTING OF POLYMERIC UNITS AT LEAST 50 PERCENT BY WEIGHT OF WHICH CORRESPOND TO AT LEAST ONE MONO-ALKENYLAROMATIC HYDROCARBON IS DISPERSED IN LIQUID SULFUR DIOXIDE AND IS THEREIN SULFONTED BY REACTION WITH A SULFONATION AGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR TRIOXIDE AND CHLOROSULFONIC ACID TO OBTAIN A SLURRY OF WATER-DISPERSIBLE SOLID RESIN SULFONATE IN LIQUID SULFUR DIOXISE IN PROPORTIONS CORRESPONDING TO NOT MORE THAN 10 PERCENT BY WEIGHT OF THE RESIN SULFONATE BASED ON THE RESULTING SLURRY, WHICH CONTAINS APPRECIABLE PROPORTIONS OF UNREACTED SULFONATION AGENT, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY FEEDING THAT SLURRY, CONSISTING ESSENTIALLY OF NOT MORE THAN 10 PERCENT BY WEIGHT OF A WATER-DISPERSIBLE SOLID SULFONATE OF A BENZENE-SOLUBLE THERMOPLASTIC SOLID ADDITION POLYMER CONSISTING OF POLYMERIC UNITS AT LEAST 50 PERCENT BY WEIGHT WHICH CORRESPOND TO AT LEAST ONE MONOALKENYLAROMATIC HYDROCARBON, LIQUIDSULFUR DIOXIDE, AND APPRECIABLE PROPORTIONS OF UNREACTED SULFONATION AGENT,
Claim 2
Dependent Claim
161 words
IN A METHOD FOR THE PREPARATION OF WATER-DISPERSIBLE RESIN SULFONATES WHEREIN A BENZENE-SOLUBLE THERMOPLASTIC SOLID ADDITION POLYMER CONSISTING OF POLYMERIC UNITS AT LEAST 50 PERCENT BY WEIGHT OF WHICH CORRESPOND TO AT LEAST ONE MONO-ALKENYLAROMATIC HYDROCARBON IS DISPERSED IN LIQUID SULFUR DIOXIDE AND IS THEREIN SULFONTED BY REACTION WITH A SULFONATION AGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR TRIOXIDE AND CHLOROSULFONIC ACID TO OBTAIN A SLURRY OF WATER-DISPERSIBLE SOLID RESIN SULFONATE IN LIQUID SULFUR DIOXISE IN PROPORTIONS CORRESPONDING TO NOT MORE THAN 10 PERCENT BY WEIGHT OF THE RESIN SULFONATE BASED ON THE RESULTING SLURRY, WHICH CONTAINS APPRECIABLE PROPORTIONS OF UNREACTED SULFONATION AGENT, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY FEEDING THAT SLURRY, CONSISTING ESSENTIALLY OF NOT MORE THAN 10 PERCENT BY WEIGHT OF A WATER-DISPERSIBLE SOLID SULFONATE OF A BENZENE-SOLUBLE THERMOPLASTIC SOLID ADDITION POLYMER CONSISTING OF POLYMERIC UNITS AT LEAST 50 PERCENT BY WEIGHT WHICH CORRESPOND TO AT LEAST ONE MONOALKENYLAROMATIC HYDROCARBON, LIQUIDSULFUR DIOXIDE, AND APPRECIABLE PROPORTIONS OF UNREACTED SULFONATION AGENT,
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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |