Patent US813824A successfully refreshed from Google Patents.
US813824A
Expired / Lapsed
US
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Smelting and refining process.
Assignee: Individual
•
Filing: 1904-05-21
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Granted: 1906-02-27
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Expires: 1924-05-21
Abstract
No abstract record available.
Inventors
- 👤 Enos C Pollard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:49
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/0028; C22B15/003; C22B15/0041
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) | 1909-02-26 | 1909-08-28 | 1910-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-02-26 | 1913-08-28 | 1914-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-02-26 | 1917-08-28 | 1918-02-27 | $7700.00 | Window Closed / Lapsed |