Patent US3075934A successfully refreshed from Google Patents.
US3075934A
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Process for preparing aqueous slurries of acrylonitrile polymer and resulting product
Assignee: EIDP Inc
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Filing: 1957-11-04
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Granted: 1963-01-29
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Expires: 1977-11-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Lester David Grandine
- 👤 Wilkinson William Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:16
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A SLURRY OF AN CRYLONITRILE POLYMER CONTAINING AT LEAST 85% BY WEIGHT COMBINED ACRYLONITRILE AND FROM 0.1% TO 15% BY WEIGHT OF A COPOLYMERIZABLE ACIDIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF ETHYLENICALLY UNSATURATED CARBOXYLIC, PHOSPHONIC, AND SULFONIC ACIDS COPOLYMERIZABLE WITH ACRYLONITRILE, SAID ACIDIC COMPONENT BEING PRESENT IN THE FORM OF A SALT OF AN ORGANIC AMINE WHEREIN SAID AMINE HAS A MAXIMUM OF ONE HYDROGEN ATTACHED TO THE NITROGEN OF THE AMINE GROUP, BETWEEN ABOUT 17.5% AND ABOUT 70% BY WEIGHT OF SAID SLURRY BEING AN ORGANIC SOLVENT FOR SAID POLYMER, SAID SLURRY CONTAINING BETWEEN ABOUT 4% AND ABOUT 20% BY WEIGHT OF WTER AND LESS THAN ABOUT 0.01% BY WEIGHT OF METAL AND INORGANIC AMMONIUM IONS.
Claim 2
Dependent Claim
118 words
A SLURRY OF AN CRYLONITRILE POLYMER CONTAINING AT LEAST 85% BY WEIGHT COMBINED ACRYLONITRILE AND FROM 0.1% TO 15% BY WEIGHT OF A COPOLYMERIZABLE ACIDIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF ETHYLENICALLY UNSATURATED CARBOXYLIC, PHOSPHONIC, AND SULFONIC ACIDS COPOLYMERIZABLE WITH ACRYLONITRILE, SAID ACIDIC COMPONENT BEING PRESENT IN THE FORM OF A SALT OF AN ORGANIC AMINE WHEREIN SAID AMINE HAS A MAXIMUM OF ONE HYDROGEN ATTACHED TO THE NITROGEN OF THE AMINE GROUP, BETWEEN ABOUT 17.5% AND ABOUT 70% BY WEIGHT OF SAID SLURRY BEING AN ORGANIC SOLVENT FOR SAID POLYMER, SAID SLURRY CONTAINING BETWEEN ABOUT 4% AND ABOUT 20% BY WEIGHT OF WTER AND LESS THAN ABOUT 0.01% BY WEIGHT OF METAL AND INORGANIC AMMONIUM IONS.
References Cited (Backward Citations)
US2732358A
Cited
US2404713A
Cited
US2436926A
Cited
US2773856A
Cited
FR1102047A
Cited
FR1102297A
Cited
US2858290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |