Patent US2658060A successfully refreshed from Google Patents.
US2658060A
Expired / Lapsed
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Process for centrifugal separation
Assignee: —
•
Filing: —
•
Granted: 1953-11-03
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Expires: 1970-11-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:18
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; C07C275/00; C07C275/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A PROCESS INVOLVING FORMATION OF COMPLEXES COMPRISING UREA AND ORGANIC COMPOUNDS CONTAINING A NORMAL ALIPHATIC CHAIN OF AT LEAST SIX CARBON ATOMS BY CONTACTING AQUEOUS UREA AT A TEMPERATURE BELOW 150* F. WITH A MIXTURE CONTAINING SAID COMPOUNDS, SAID AQUEOUS UREA BEING SELECTED FROM THE GROUP CONSISTING OF SATURATED UREA SOLUTION AND A UREA SLURRY, THE IMPROVEMENT WHICH COMPRISES EFFECTING SEPARATION OF SAID RESULTING COMPLEX-CONTAINING MIXTURE CONSISTING OF WATER AND SAID ORGANIC COMPOUNDS BY CENTRIFUGING AT A TEMPERAUTRE BETWEEN 120 AND 140* F. WHEREBY THERE ARE OBTAINED AN ORGANIC LIGHT STREAM AND A DENSE AQUEOUS STREAM CONTAINING SAID COMPLEX.
Claim 2
Dependent Claim
100 words
IN A PROCESS INVOLVING FORMATION OF COMPLEXES COMPRISING UREA AND ORGANIC COMPOUNDS CONTAINING A NORMAL ALIPHATIC CHAIN OF AT LEAST SIX CARBON ATOMS BY CONTACTING AQUEOUS UREA AT A TEMPERATURE BELOW 150* F. WITH A MIXTURE CONTAINING SAID COMPOUNDS, SAID AQUEOUS UREA BEING SELECTED FROM THE GROUP CONSISTING OF SATURATED UREA SOLUTION AND A UREA SLURRY, THE IMPROVEMENT WHICH COMPRISES EFFECTING SEPARATION OF SAID RESULTING COMPLEX-CONTAINING MIXTURE CONSISTING OF WATER AND SAID ORGANIC COMPOUNDS BY CENTRIFUGING AT A TEMPERAUTRE BETWEEN 120 AND 140* F. WHEREBY THERE ARE OBTAINED AN ORGANIC LIGHT STREAM AND A DENSE AQUEOUS STREAM CONTAINING SAID COMPLEX.
References Cited (Backward Citations)
US2499820A
Cited
US2557257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |