US1833894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in poling copper
Assignee: UNITED STATES METALS REFINING Co
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Filing: 1929-12-27
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Granted: 1931-12-01
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Expires: 1949-12-27
Abstract
No abstract record available.
Inventors
- 👤 William F Eppensteiner
- 👤 Groom John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:01
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/006; F; F27; F27B; F27B3/00; F27B3/10; F27B3/18; F27D; F27D3/00; F27D2003/0034; F27D2003/0051; F27D3/0025; F27D3/003; F27M; F27M2001/00; F27M2001/15; F27M2001/1539; F27M2001/1547
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) | 1934-11-30 | 1935-06-01 | 1935-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-30 | 1939-06-01 | 1939-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-30 | 1943-06-01 | 1943-12-01 | $7700.00 | Window Closed / Lapsed |