Patent US2094632A successfully refreshed from Google Patents.
US2094632A
Expired / Lapsed
US
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Metallurgical process
Assignee: American Smelting and Refining Co
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Filing: 1934-12-03
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Granted: 1937-10-05
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Expires: 1954-12-03
Abstract
No abstract record available.
Inventors
- 👤 Jesse O Betterton
- 👤 George K Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:17
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/001; C22B25/00; C22B25/06; C22B7/006; C22B7/007; 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) | 1940-10-04 | 1941-04-05 | 1941-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-10-04 | 1945-04-05 | 1945-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-10-04 | 1949-04-05 | 1949-10-05 | $7700.00 | Window Closed / Lapsed |