US1240824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of concentration of metalliferous ores.
Assignee: Individual
•
Filing: 1914-01-02
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Granted: 1917-09-25
•
Expires: 1934-01-02
Abstract
No abstract record available.
Inventors
- 👤 Selden Irwin Clawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:23
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/24; B03D1/247; B03D1/001; B03D1/004; B03D1/012; B03D1/1443; B03D1/1456
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) | 1920-09-24 | 1921-03-26 | 1921-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-09-24 | 1925-03-26 | 1925-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-09-24 | 1929-03-26 | 1929-09-25 | $7700.00 | Window Closed / Lapsed |