Patent DE334852C successfully refreshed from Google Patents.
US2519971A
Expired / Lapsed
US
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Centrifuging apparatus
Assignee: Tecalemit Ltd
•
Filing: 1945-11-26
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Granted: 1950-08-22
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Expires: 1965-11-26
Abstract
No abstract record available.
Inventors
- 👤 Clair Camille Clare Sprankl Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:57
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0217; B04; B04B; B04B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US165785A
Cited
US1101548A
Cited
GB190517250A
Cited
US1052777A
Cited
FR392411A
Cited
US937986A
Cited
US1056233A
Cited
FR663261A
Cited
GB302685A
Cited
US2177082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |