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Patent US2658618A successfully refreshed from Google Patents.
US2658618A
Expired / Lapsed
US
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Separation of solid materials of different specific gravities
Assignee: Individual
•
Filing: 1950-04-26
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Granted: 1953-11-10
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Expires: 1970-04-26
Abstract
No abstract record available.
Inventors
- 👤 Vogel Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:28
CPC Classifications
B; B04; B04C; B04C3/00; B04C3/04; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/32; B04C5/00; B04C5/24; B04C5/28; B04C9/00; B04C2009/004; B04C2009/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2109121A
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FR791194A
Cited
US2109234A
Cited
AU71036A
Cited
US2272005A
Cited
US2431559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |