Patent US2979270A successfully refreshed from Google Patents.
US2979270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen lances for open-hearth furnaces and the like
Assignee: Individual
•
Filing: 1959-02-27
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Granted: 1961-04-11
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Expires: 1979-02-27
Abstract
No abstract record available.
Inventors
- 👤 Leland H Hutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:47
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; F; F27; F27B; F27B3/00; F27B3/10; F27B3/22; F27D; F27D3/00; F27D3/16
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |