Patent US3368804A successfully refreshed from Google Patents.
US3368804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast furnace injection fuel control
Assignee: Elsag Bailey Inc
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Filing: 1965-08-17
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Granted: 1968-02-13
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Expires: 1985-08-17
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Swain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:19
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/001; C21B5/003; C21B5/004
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) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |