Patent US4239586A successfully refreshed from Google Patents.
Patent US3145173A successfully refreshed from Google Patents.
US3145173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge having forced solids discharge
Assignee: Pennwalt Corp
•
Filing: 1962-11-26
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Granted: 1964-08-18
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Sharples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:37
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A CENTRIFUGE FOR CONCENTRATING SOLIDS INTO PASTY CONSISTENCY FROM A SUSPENSION, COMPRISING A HOLLOW IMPERFORATE-WALLED ROTOR HAVING A SOLIDS DISCHAGE PORT SPACED INWARD FROM THE IMPERFORATE WALL MENS TO DISCHARGE CLARIFIED LIQUID, A PAIR OF COEXTENSIVE RADIALLY SPACED SURFACES IN SAID ROTOR EXTENDING FROM A REGION IN THE ROTOR REMOTE FROM THE SOLIDS DISCHARGE PORT AND GENERALLY TOWARD THE SOLIDS DISCHARGE PORT, MEANS FOR ROTATING THE ROTOR, MEANS FOR DELIVERING THE SUSPENSION TO A ZONE IN THE ROTOR BETWEEN THE SURFACES FOR CENTRIFUGATION, MEANS TO MOVE ONE OF THE SURFACES IN A SUBSTANTILLY RADICAL DIRECTION TOWARD THE OTHER AND SUBSTANTIALLY INTO CONTACT THEREWITH IN A MOVEMENT WHICH PROGRESSES FROM SAID REGION AND TOWARD THE SOLIDS DISCHARGE PORT, WHEREBY CONCENTRATED PASTY SOLIDS BETWEEN THE SURFACES MAY BE EXTRUDED INWARD TO THE SOLIDS DISCHARGE PORT FOR DISCHARGE.
Claim 2
Dependent Claim
135 words
A CENTRIFUGE FOR CONCENTRATING SOLIDS INTO PASTY CONSISTENCY FROM A SUSPENSION, COMPRISING A HOLLOW IMPERFORATE-WALLED ROTOR HAVING A SOLIDS DISCHAGE PORT SPACED INWARD FROM THE IMPERFORATE WALL MENS TO DISCHARGE CLARIFIED LIQUID, A PAIR OF COEXTENSIVE RADIALLY SPACED SURFACES IN SAID ROTOR EXTENDING FROM A REGION IN THE ROTOR REMOTE FROM THE SOLIDS DISCHARGE PORT AND GENERALLY TOWARD THE SOLIDS DISCHARGE PORT, MEANS FOR ROTATING THE ROTOR, MEANS FOR DELIVERING THE SUSPENSION TO A ZONE IN THE ROTOR BETWEEN THE SURFACES FOR CENTRIFUGATION, MEANS TO MOVE ONE OF THE SURFACES IN A SUBSTANTILLY RADICAL DIRECTION TOWARD THE OTHER AND SUBSTANTIALLY INTO CONTACT THEREWITH IN A MOVEMENT WHICH PROGRESSES FROM SAID REGION AND TOWARD THE SOLIDS DISCHARGE PORT, WHEREBY CONCENTRATED PASTY SOLIDS BETWEEN THE SURFACES MAY BE EXTRUDED INWARD TO THE SOLIDS DISCHARGE PORT FOR DISCHARGE.
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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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |