US2585800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleeder and equalizer for blast furnaces
Assignee: Republic Steel Corp
•
Filing: 1947-09-03
•
Granted: 1952-02-12
•
Expires: 1967-09-03
Abstract
No abstract record available.
Inventors
- 👤 Viseur Kurt G Le
- 👤 Larson Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:35
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US721418A
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US759991A
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US1881272A
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US2215872A
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US2200488A
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US2411487A
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US2516190A
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US2408945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |