US2558963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for roasting ores
Assignee: Combined Metals Reduction Co
•
Filing: 1948-08-18
•
Granted: 1951-07-03
•
Expires: 1968-08-18
Abstract
No abstract record available.
Inventors
- 👤 Klepetko Ernest
- 👤 Philip De B Kaye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:29
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/10; F27B3/22; C; C22; C22B; C22B1/00; C22B1/02; F27B9/00; F27B9/14; F27B9/20; F27B9/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2104091A
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US2110309A
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US2219427A
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US2313019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |