Patent US2087272A successfully refreshed from Google Patents.
US2087272A
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Method of reducing ores
Assignee: ELECTRIC SMELTERS Inc
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Filing: 1933-06-10
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Granted: 1937-07-20
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Expires: 1953-06-10
Abstract
No abstract record available.
Inventors
- 👤 Raymond S Wile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:25
CPC Classifications
C; C22; C22B; C22B4/00; C22B4/08; C21; C21C; C21C5/00; C21C5/52; C22B5/00; 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) | 1940-07-19 | 1941-01-18 | 1941-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-07-19 | 1945-01-18 | 1945-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-07-19 | 1949-01-18 | 1949-07-20 | $7700.00 | Window Closed / Lapsed |