Patent US2961433A successfully refreshed from Google Patents.
US2961433A
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Polymerization of acrylonitrile employing a halide of a transition metal and the borohydride of an alkali metal
Assignee: EIDP Inc
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Filing: 1956-11-29
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Granted: 1960-11-22
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Expires: 1976-11-29
Abstract
No abstract record available.
Inventors
- 👤 William J Linn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:28
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN THE POLYMERIZATION OF ACRYLONITRILE, THE IMPROVEMENT WHEREIN AN ACRYLONITRILE COMPOSITION IS POLYMERIZED BY BRINGING THE SAME IN CONTACT WITH AN AQUEOUS SYSTEM HAVING A PH NOT GREATER THAN ABOUT 2 AND CONTAINING A HALIDE OF A TRANSITION METAL OF THE GROUP CONSISTING OF VANADIUM, IRON AND TITANIUM AND THE BOROHYDRIDE OF AN ALKALI METAL.
Claim 2
Dependent Claim
55 words
IN THE POLYMERIZATION OF ACRYLONITRILE, THE IMPROVEMENT WHEREIN AN ACRYLONITRILE COMPOSITION IS POLYMERIZED BY BRINGING THE SAME IN CONTACT WITH AN AQUEOUS SYSTEM HAVING A PH NOT GREATER THAN ABOUT 2 AND CONTAINING A HALIDE OF A TRANSITION METAL OF THE GROUP CONSISTING OF VANADIUM, IRON AND TITANIUM AND THE BOROHYDRIDE OF AN ALKALI METAL.
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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |