Patent US3408000A successfully refreshed from Google Patents.
US3408000A
Expired / Lapsed
US
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Determination of sludge level in sludge centrifuge
Assignee: Alfa Laval AB
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Filing: 1966-08-16
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Granted: 1968-10-29
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Expires: 1986-08-16
Abstract
No abstract record available.
Inventors
- 👤 Nilson Carl-Goran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:19
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/04; B04B11/043; B04B1/00; B04B1/10; B04B1/14; B04B1/16; B04B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2917230A
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US3189268A
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US3301476A
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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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |