US3170977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen lance with detachable barrel
Assignee: Beazer East Inc
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Filing: 1961-11-16
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Granted: 1965-02-23
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Expires: 1981-11-16
Abstract
No abstract record available.
Inventors
- 👤 Richard F Obenchain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:36
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; C21C5/462
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
APPARATUS FOR APPLYING GAS TO A METALLIC REFINING BATH COMPRISING: (A) A PAIR OF LANCES, (B) MOVABLE SUPPORTING MEANS FOR SAID PAIR OF LANCES, (C) MEANS FOR SELECTIVELY RECIPROCATING SAID SUPPORTING MEANS, WHEREBY A SELECTED ONE OF SAID PAIR OF LANCES IS POSITIONED OVER SAID METALLIC BATH, AND (D) MEANS ON SAID SUPPORT MEANS OPERATIVELY CONNECTED TO EACH OF SAID LANCES TO RAISE AND LOWER SAID LANCES RELATIVE TO SAID METALLIC BATH, (E) EACH OF SAID LANCES COMPRISING: (1) A LANCE HEAD HAVING SECTIONS THEREIN FOR SEPARATELY RECEIVING AND DISTRIBUTING GASES AND COOLING MEDIUM, (2) A LANCE BARREL COMPRISING A PLURALITY OF CONCENTRIC CONDUITS JOINED TOGETHER.
References Cited (Backward Citations)
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Cited
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Cited
US2701148A
Cited
US2818247A
Cited
US2863656A
Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |