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US2927690A
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Apparatus for ore separation
Assignee: Bolidens Gruvaktiebolag
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Filing: 1953-04-28
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Granted: 1960-03-08
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Expires: 1973-04-28
Abstract
No abstract record available.
Inventors
- 👤 Malmqvist Johan David
- 👤 Thomaeus Ivar Goran Ragnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:38
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/36; B07C5/361; B07C5/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1640524A
Cited
GB284307A
Cited
US2057835A
Cited
US2154156A
Cited
US2208145A
Cited
US2504731A
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US2587686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |