Patent US2504045A successfully refreshed from Google Patents.
US2504045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating aliphatic nitriles, water, ammonia, and hydrogenation-inhibiting impurities
Assignee: Armour and Co
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Filing: 1945-08-08
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Granted: 1950-04-11
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Expires: 1965-08-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:33
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
IN A NITRILE PROCESS OF THE CHARACTER SET FORTH, THE STEPS OF PASSING A MIXTURE OF ALIPHATIC NITRILES HAVING AT LEAST SIX CARBON ATOMS, WATER, AMMONIA, AND HYDROGENATION-INHIBITING IMPURITIES PRODUCED IN THE FORMATION OF NITRILES BY THE ACTION OF AMMONIA ON FATTY ACIDS INTO A SEPARATING ZONE, MAINTAINING IN SAID ZONE HEAT-EXCHANGING POOLS OF AMMONIA, WATER, AND NITRILES, CONTACTING VAPORS FROM SAID MIXTURE WITH SAID POOLS TO VAPORIZE WATER AND AMMONIA THEREIN AND CONDENSE SAID NITRILES, WITHDRAWING AMMONIA AND NITRILES AT OPPOSITE ENDS OF SAID SEPARATING ZONE,
References Cited (Backward Citations)
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US2314894A
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US2395057A
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US2448275A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |