Patent US3285507A successfully refreshed from Google Patents.
US3285507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw-type solids discharge centrifuge having means to discharge light solids
Assignee: Pennwalt Corp
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Filing: 1964-12-02
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Granted: 1966-11-15
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Expires: 1984-12-02
Abstract
No abstract record available.
Inventors
- 👤 Shapiro Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A CENTRIFUGE COMPRISING A SOLID BOWL HAVING DISCHARGE OPENINGS AT OPPOSITE ENDS FOR LIQUID AND SOLIDS, RESPECTIVELY, THE LIQUID DISCHARGE OPENING BEING DISPOSED AT A LEVEL SPACED INWARD FROM THE PERIPHERY OF THE BOWL, THE SOLIDS DISCHARGE OPENING BEING SPACED INWARD FROM THE LIQUID DISCHARGE OPENING, A SCREW CONVEYOR WITHIN THE BOWL FOR MOVING SOLIDS TO THE SOLIDS DISCHARGE OPENING, FLIGHTS ON THE SCREW CONVEYOR EXTENDING OUTWARD TO A LEVEL IN THE BOWL JUST INWARD OF THE FIRST-MENTIONED LEVEL, AND RIBS SECURED TO THE PERIPHERY OF THE BOWL AND EXTENDING INWARD APPROXIMATELY TO SAID FIRST-MENTIONED LEVEL ALONG A SUBSTANTIAL PORTION OF THEIR LENGTH.
Claim 2
Dependent Claim
103 words
A CENTRIFUGE COMPRISING A SOLID BOWL HAVING DISCHARGE OPENINGS AT OPPOSITE ENDS FOR LIQUID AND SOLIDS, RESPECTIVELY, THE LIQUID DISCHARGE OPENING BEING DISPOSED AT A LEVEL SPACED INWARD FROM THE PERIPHERY OF THE BOWL, THE SOLIDS DISCHARGE OPENING BEING SPACED INWARD FROM THE LIQUID DISCHARGE OPENING, A SCREW CONVEYOR WITHIN THE BOWL FOR MOVING SOLIDS TO THE SOLIDS DISCHARGE OPENING, FLIGHTS ON THE SCREW CONVEYOR EXTENDING OUTWARD TO A LEVEL IN THE BOWL JUST INWARD OF THE FIRST-MENTIONED LEVEL, AND RIBS SECURED TO THE PERIPHERY OF THE BOWL AND EXTENDING INWARD APPROXIMATELY TO SAID FIRST-MENTIONED LEVEL ALONG A SUBSTANTIAL PORTION OF THEIR LENGTH.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |