US2521054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal extractor
Assignee: ELLIS DRIER CO
•
Filing: 1945-01-22
•
Granted: 1950-09-05
•
Expires: 1965-01-22
Abstract
No abstract record available.
Inventors
- 👤 Hubert C Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:18
CPC Classifications
D; D06; D06F; D06F49/00; D06F34/00; D06F34/06; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US655536A
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US1236529A
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US1203567A
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US1202890A
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US1531844A
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US1773710A
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US1853821A
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US2169260A
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US2261936A
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US2174018A
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US2325406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |