Patent US2287663A successfully refreshed from Google Patents.
US2287663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal production
Assignee: MINERALS AND METALS Corp
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Filing: 1940-12-07
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Granted: 1942-06-23
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Expires: 1960-12-07
Abstract
No abstract record available.
Inventors
- 👤 Herman A Brassert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:44
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/14; C21B13/0086; C21B13/0093
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) | 1945-06-22 | 1945-12-22 | 1946-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-22 | 1949-12-22 | 1950-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-22 | 1953-12-22 | 1954-06-23 | $7700.00 | Window Closed / Lapsed |