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Patent US3497061A successfully refreshed from Google Patents.
US3497061A
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Apparatus for treating magnetic ore
Assignee: EDWARD G FERRIS
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Filing: 1968-01-23
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Granted: 1970-02-24
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Expires: 1988-01-23
Abstract
No abstract record available.
Inventors
- 👤 Edward G Ferris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:53
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US739741A
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US780870A
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US939523A
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US1177981A
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US1729095A
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US1686917A
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US2256728A
Cited
SU116785A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |