Patent US2084830A successfully refreshed from Google Patents.
US2084830A
Expired / Lapsed
US
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Metallurgical process and apparatus
Assignee: Anaconda Copper Mining Co
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Filing: 1935-07-31
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Granted: 1937-06-22
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Expires: 1955-07-31
Abstract
No abstract record available.
Inventors
- 👤 Enoch A Barnard
- 👤 Hugh J Maguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:49
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/0028; C22B15/003; C22B15/0036
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) | 1940-06-21 | 1940-12-21 | 1941-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-21 | 1944-12-21 | 1945-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-21 | 1948-12-21 | 1949-06-22 | $7700.00 | Window Closed / Lapsed |