US1679337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment and concentration of copper ores
Assignee: METALS PRODUCTION Co OF N
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Filing: 1925-09-14
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Granted: 1928-07-31
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Expires: 1945-09-14
Abstract
No abstract record available.
Inventors
- 👤 Moulden John Collett
- 👤 Taplin Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:53
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/08; C22B15/00; C22B15/0002; C22B15/001; C22B15/0021; C22B15/0023; C22B15/0063; C22B15/0065; C22B15/0078; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1931-07-31 | 1932-01-30 | 1932-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-07-31 | 1936-01-30 | 1936-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-07-31 | 1940-01-30 | 1940-07-31 | $7700.00 | Window Closed / Lapsed |