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US3079069A
Expired / Lapsed
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Self-opening sludge centrifuge
Assignee: Alfa Laval Holdings Amsterdam AB
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Filing: 1959-05-11
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Granted: 1963-02-26
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Expires: 1979-05-11
Abstract
No abstract record available.
Inventors
- 👤 Thylefors Henric Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:37
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/14; B04B1/16; B04B1/18; B04B7/00; B04B7/08; B04B7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1947844A
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US2091329A
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DE622012C
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US2178547A
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FR971978A
Cited
US2487364A
Cited
GB600239A
Cited
US2787374A
Cited
US2779469A
Cited
US3012710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |