US2058947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper refining
Assignee: American Smelting and Refining Co
•
Filing: 1933-08-17
•
Granted: 1936-10-27
•
Expires: 1953-08-17
Abstract
No abstract record available.
Inventors
- 👤 Jesse O Betterton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:47
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/0028; C22B15/005; C22B15/0052; C22B9/00; C22B9/006
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) | 1939-10-27 | 1940-04-27 | 1940-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-10-27 | 1944-04-27 | 1944-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-10-27 | 1948-04-27 | 1948-10-27 | $7700.00 | Window Closed / Lapsed |