US3045997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous oxygen lance
Assignee: Armco Inc
•
Filing: 1959-03-02
•
Granted: 1962-07-24
•
Expires: 1979-03-02
Abstract
No abstract record available.
Inventors
- 👤 Edwin B Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:12
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2548231A
Cited
GB755416A
Cited
US2829960A
Cited
US2828956A
Cited
US2863656A
Cited
US2807506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |