US3501136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for lifting and lowering oxygen lances for top-blowing converters
Assignee: Voestalpine AG
•
Filing: 1967-10-16
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Granted: 1970-03-17
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Expires: 1987-10-16
Abstract
No abstract record available.
Inventors
- 👤 Otto Schweng
- 👤 Karl Steinmair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:18
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; C21C5/462
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1035230A
Cited
US1270716A
Cited
US1300647A
Cited
FR818634A
Cited
US2113468A
Cited
GB521515A
Cited
US3007691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |