US1518828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of copper from ores thereof
Assignee: THORNHILL ANDERSON Co
•
Filing: 1922-11-06
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Granted: 1924-12-09
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Expires: 1942-11-06
Abstract
No abstract record available.
Inventors
- 👤 Edwin B Thornhill
- 👤 Hector G S Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:42
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; C22B15/0084; C22B15/0089; C22B15/0091; C22B15/0002; C22B15/0004; C22B15/0006; C22B15/0065; C22B15/0067; 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) | 1927-12-09 | 1928-06-09 | 1928-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-12-09 | 1932-06-09 | 1932-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-12-09 | 1936-06-09 | 1936-12-09 | $7700.00 | Window Closed / Lapsed |