US1256703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous retort for treating quicksilver ores.
Assignee: Pacific Foundry Co
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Filing: 1917-04-16
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Granted: 1918-02-19
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Expires: 1937-04-16
Abstract
No abstract record available.
Inventors
- 👤 William H Landers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:01
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/05; B01F27/11; B01F27/114; B01F27/1143
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) | 1921-02-18 | 1921-08-20 | 1922-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-02-18 | 1925-08-20 | 1926-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-02-18 | 1929-08-20 | 1930-02-19 | $7700.00 | Window Closed / Lapsed |