US959646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic separating process.
Assignee: BLAKE MINING AND MILLING Co
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Filing: 1905-01-18
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Granted: 1910-05-31
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Expires: 1925-01-18
Abstract
No abstract record available.
Inventors
- 👤 Walter G Swart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1913-05-30 | 1913-11-29 | 1914-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-05-30 | 1917-11-29 | 1918-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-05-30 | 1921-11-29 | 1922-05-31 | $7700.00 | Window Closed / Lapsed |