Patent US1396740A successfully refreshed from Google Patents.
US1396740A
Expired / Lapsed
US
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Process of treating complex zinc-lead ores
Assignee: Individual
•
Filing: 1919-05-06
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Granted: 1921-11-15
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Expires: 1939-05-06
Abstract
No abstract record available.
Inventors
- 👤 Ganelin Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:03
CPC Classifications
C; C22; C22B; C22B13/00; C22B13/04; B; B01; B01F; B01F27/00; B01F27/60; B01F27/70; B01F35/00; B01F35/71; B01F35/717; B01F35/71775
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) | 1924-11-14 | 1925-05-16 | 1925-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-14 | 1929-05-16 | 1929-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-14 | 1933-05-16 | 1933-11-15 | $7700.00 | Window Closed / Lapsed |