Patent US2620925A successfully refreshed from Google Patents.
US2620925A
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Apparatus for the separation of particles
Assignee: Individual
•
Filing: 1949-07-12
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Granted: 1952-12-09
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Expires: 1969-07-12
Abstract
No abstract record available.
Inventors
- 👤 Tedman Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:01
CPC Classifications
B; B04; B04C; B04C1/00; B04C3/00; B04C7/00; B21; B21C; B21C23/00; B21C23/007; B21J; B21J5/00; B21J5/06; B21J5/08; B21K; B21K23/00; B21K23/04; H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/80; H01M4/806; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US468935A
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US696606A
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US762867A
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US825807A
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US958942A
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US1505741A
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US2102525A
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US2175563A
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US2301371A
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US2273271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |