Patent US471617A successfully refreshed from Google Patents.
US471617A
Expired / Lapsed
US
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Apparatus for treating refractory ores
Assignee: —
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Filing: —
•
Granted: 1892-03-29
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Expires: 1909-03-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:31
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; F; F27; F27B; F27B3/00; F27B3/02; F27D; F27D99/00; F27D99/0001; F27D99/0033
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) | 1895-03-29 | 1895-09-28 | 1896-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1899-03-29 | 1899-09-28 | 1900-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1903-03-30 | 1903-09-29 | 1904-03-30 | $7700.00 | Window Closed / Lapsed |