US3486882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous steel making process
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1968-07-23
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Granted: 1969-12-30
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Expires: 1988-07-23
Abstract
No abstract record available.
Inventors
- 👤 Jean Raguin
- 👤 Jean Rouanet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C5/567; C21C5/28; Y; Y10; Y10S; Y10S75/00; Y10S75/957
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) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |