US3366376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen injection apparatus for steelmaking converters
Assignee: United States Steel Corp
•
Filing: 1964-11-30
•
Granted: 1968-01-30
•
Expires: 1984-11-30
Abstract
No abstract record available.
Inventors
- 👤 Jesse D Marino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:09
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; C21C5/462; B; B60; B60G; B60G17/00; B60G17/02; B60G17/033; B60G21/00; B60G21/02; B60G21/06; B60G21/073
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |