US2465893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for smelting and refining
Assignee: Individual
•
Filing: 1947-07-07
•
Granted: 1949-03-29
•
Expires: 1967-07-07
Abstract
No abstract record available.
Inventors
- 👤 Leighton M Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:40
CPC Classifications
C; C22; C22B; C22B9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1596888A
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US1849502A
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US2014059A
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US2252371A
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US2250913A
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US2189113A
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US2306713A
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US2298055A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-28 | 1952-09-27 | 1953-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-28 | 1956-09-27 | 1957-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-28 | 1960-09-27 | 1961-03-29 | $7700.00 | Window Closed / Lapsed |