US3401794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of tin-bearing ores
Assignee: Canadian Patents and Development Ltd
•
Filing: 1965-07-12
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Granted: 1968-09-17
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Expires: 1985-07-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Farnand
- 👤 Frederick W Meadus
- 👤 Ira E Puddington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:21
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; C; C22; C22B; C22B25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |