US3140257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separation process and apparatus
Assignee: Pennwalt Corp
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Filing: 1961-05-29
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Granted: 1964-07-07
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Perry W Wilder
- 👤 Jr Rodney T Bonsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:56
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/10; B01; B01D; B01D21/00; B01D21/02; B01D21/24; B01D21/2405; B01D21/2411; B01D21/2444; B01D21/26; B01D21/262; B01D21/30; B01D21/34; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/52; B01D33/56; B01D33/70; B01D33/72; B01D33/727; B01D33/80; B01D33/804; B01D33/807; B01D2201/00; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE PROCESS OF SEPARATING A LIGHTER PHASE FROM A HEAVIER PHASE IN A FEED MIXTURE OF SUCH PHASES COMPRISING THE STEPS OF INTRODUCING THE FEED MIXTURE TO A GRAVITY SETTLING ZONE, ALLOWING THE FEED MIXTURE TO SETTLE TO A LIGHTER STRATUM AND A HEAVIER STRATUM, CONTINUSOULY REMOVING LIQUID FROM A LEVEL IN THE LIGHTER STRATUM BELOW THE TOP SURFACE OF THE FEED MIXTURE AND FEEDING IT AT A SUBSTANTIALLY UNIFORM RATE AT A FIXED POINT SUBSTANTIALLY TANGENTIALLY TO A CENTRIFUGING ZONE HAVING A STATIONARY BOUNDARY WALL AND A ROTATING STRUCTURE THEREIN, SAID LIQUID BEING SEPARATED IN SAID CENTRIFUGING ZONE INTO AN INWARDLY FLOWING LIGHTER PHASE AND AN OUTWARDLY FLOWING FLUID OF GREATER DENSITY THAN THE LIGHTER PHASE, SEPARATELY REMOVING THE LIGHTER PHASE AND THE FLUID OF GREATER DENSITY FROM SAID ZONE OF CENTRIFUGATION, AND FEEDING THE FLUID OF GREATER DENSITY IN A STREAM BACK INTO THE GRAVITY SETTLING
Claim 2
Dependent Claim
148 words
THE PROCESS OF SEPARATING A LIGHTER PHASE FROM A HEAVIER PHASE IN A FEED MIXTURE OF SUCH PHASES COMPRISING THE STEPS OF INTRODUCING THE FEED MIXTURE TO A GRAVITY SETTLING ZONE, ALLOWING THE FEED MIXTURE TO SETTLE TO A LIGHTER STRATUM AND A HEAVIER STRATUM, CONTINUSOULY REMOVING LIQUID FROM A LEVEL IN THE LIGHTER STRATUM BELOW THE TOP SURFACE OF THE FEED MIXTURE AND FEEDING IT AT A SUBSTANTIALLY UNIFORM RATE AT A FIXED POINT SUBSTANTIALLY TANGENTIALLY TO A CENTRIFUGING ZONE HAVING A STATIONARY BOUNDARY WALL AND A ROTATING STRUCTURE THEREIN, SAID LIQUID BEING SEPARATED IN SAID CENTRIFUGING ZONE INTO AN INWARDLY FLOWING LIGHTER PHASE AND AN OUTWARDLY FLOWING FLUID OF GREATER DENSITY THAN THE LIGHTER PHASE, SEPARATELY REMOVING THE LIGHTER PHASE AND THE FLUID OF GREATER DENSITY FROM SAID ZONE OF CENTRIFUGATION, AND FEEDING THE FLUID OF GREATER DENSITY IN A STREAM BACK INTO THE GRAVITY SETTLING
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |