US3291471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowing lance for carrying out top-blowing processes
Assignee: Voestalpine AG
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Filing: 1963-12-09
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Granted: 1966-12-13
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Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Heyer Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:02
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; C21C5/462; A; A45; A45D; A45D20/00; A45D20/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A BLOWING LANCE FOR CARRYING OUT TOP-BLOWING PROCESSES, COMPRISING TWO CONCENTRICALLY ARRANGED TUBES, THE OUTER OF SAID TUBES BEING CONNECTED TO A BLOWING GAS SUPPLY CONDUIT CARRYING A SUSPENSION OF FINELY DIVIDED SOLID SUBSTANCES IN A BLOWING-GAS, THE HEAD OF THE BLOWING LANCE BEING DESIGNATED TO FORM A GAS-TIGHT HOUSING IN WHICH AN INSERT MEMBER MADE OF WEAR-RESISTING MATERIAL IS REPLACEABLY INSERTED, SAID INSERT MEMBER HAVING A CURVED
Claim 2
Dependent Claim
68 words
A BLOWING LANCE FOR CARRYING OUT TOP-BLOWING PROCESSES, COMPRISING TWO CONCENTRICALLY ARRANGED TUBES, THE OUTER OF SAID TUBES BEING CONNECTED TO A BLOWING GAS SUPPLY CONDUIT CARRYING A SUSPENSION OF FINELY DIVIDED SOLID SUBSTANCES IN A BLOWING-GAS, THE HEAD OF THE BLOWING LANCE BEING DESIGNATED TO FORM A GAS-TIGHT HOUSING IN WHICH AN INSERT MEMBER MADE OF WEAR-RESISTING MATERIAL IS REPLACEABLY INSERTED, SAID INSERT MEMBER HAVING A CURVED
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |