Patent US1377854A successfully refreshed from Google Patents.
US2641607A
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Method for preparing unsaturated nitriles
Assignee: EIDP Inc
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Filing: 1950-06-15
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Granted: 1953-06-09
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Expires: 1970-06-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles J Albisetti
- 👤 Norman G Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:07
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD FOR PREPARING UNSATURATED NITRILES WHICH COMPRISES HEATING AT A TEMPERATURE OF 215* TO 330* C. UNDER SUPERATMOSPHERIC PRESSURE OF 25 TO 1020 ATMOSPHERES, A MIXTURE FREE FROM A POLYMERIZATION CATALYST AND CONTAINING A NEUTRAL ETHYLENICALLY UNSATURATED COMPOUND HAVING FROM 1 TO 2 ETHYLENICALLY UNSATURATED NO-CONJUGATED DOUBLE BONDS AS THE SOLE ALIPHATIC CARBON-TOCARBON UNSATURATION, AND HAVING ADJACENT TO ONE OF THE DOUBLY BONDED CARBONS A CARBON ATOM HAVING ATTACHED THERETO AT LEAST ONE HYDROGEN ATOM AND THE SAID DOUBLY BONDED CARBON ATOMS BEING FREE OF CYANO GROUPS ATTACHED THERETO, AND A 2-ALKENENTRILE HAVING THE FORMULA
Claim 2
Independent Claim
96 words
A METHOD FOR PREPARING UNSATURATED NITRILES WHICH COMPRISES HEATING AT A TEMPERATURE OF 215* TO 330* C. UNDER SUPERATMOSPHERIC PRESSURE OF 25 TO 1020 ATMOSPHERES, A MIXTURE FREE FROM A POLYMERIZATION CATALYST AND CONTAINING A NEUTRAL ETHYLENICALLY UNSATURATED COMPOUND HAVING FROM 1 TO 2 ETHYLENICALLY UNSATURATED NO-CONJUGATED DOUBLE BONDS AS THE SOLE ALIPHATIC CARBON-TOCARBON UNSATURATION, AND HAVING ADJACENT TO ONE OF THE DOUBLY BONDED CARBONS A CARBON ATOM HAVING ATTACHED THERETO AT LEAST ONE HYDROGEN ATOM AND THE SAID DOUBLY BONDED CARBON ATOMS BEING FREE OF CYANO GROUPS ATTACHED THERETO, AND A 2-ALKENENTRILE HAVING THE FORMULA
References Cited (Backward Citations)
US2280058A
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US2234566A
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US2232785A
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US2352515A
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US2342607A
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US2518397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |