Patent US715238A successfully refreshed from Google Patents.
US715238A
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US
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Process of refining lead and zinc fume.
Assignee: UNITED STATES SMELTING Co
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Filing: 1901-03-25
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Granted: 1902-12-09
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Expires: 1921-03-25
Abstract
No abstract record available.
Inventors
- 👤 Frank L Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:28
CPC Classifications
C; C22; C22B; C22B13/00; C22B13/02; C22B19/00; C22B19/04; C22B5/00; C22B5/02; C22B5/12; C22B5/14; C01; C01P; C01P2006/00; C01P2006/60
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) | 1905-12-08 | 1906-06-09 | 1906-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-12-08 | 1910-06-09 | 1910-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-12-08 | 1914-06-09 | 1914-12-09 | $7700.00 | Window Closed / Lapsed |