Patent US3427013A successfully refreshed from Google Patents.
US3427013A
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US
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Low temperature blast furnace and method therefor
Assignee: Steep Rock Iron Mines Ltd
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Filing: 1966-09-08
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Granted: 1969-02-11
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Expires: 1986-09-08
Abstract
No abstract record available.
Inventors
- 👤 Patrick Edgar Cavanagh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:15
CPC Classifications
C; C21; C21B; C21B7/00; C21B13/00; C21B13/02; F; F27; F27B; F27B1/00; F27B1/005; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |