Patent US3240481A successfully refreshed from Google Patents.
US3240481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for adding solids and oxygen to an open hearth furnace
Assignee: United States Steel Corp
•
Filing: 1961-07-27
•
Granted: 1966-03-15
•
Expires: 1981-07-27
Abstract
No abstract record available.
Inventors
- 👤 Robert W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:28
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/10; F27B3/22; C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; C21C5/4613; F27D; F27D3/00; F27D3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A LANCE COMPRISING A TUBULAR MEMBER HAVING A BORE WITH A DISCHARGE OPENING AT ITS FORWARD END, A PASSAGEWAY AROUND SAID TUBULAR MEMBER, AND A NOZZLE END SECURED TO THE FORWARD END OF SAID TUBULAR MEMBER, SAID NOZZLE END HAVING AN AXIAL OPENING THERETHROUGH IN AXIAL ALIGNMENT WITH SAID DISCHARGE OPENING AND AN END FACE SURROUNDING THE EXIT END OF SID AXIAL OPENING, SAID NOZZLE END HAVING A PLURALITY OF OPENINGS THEREIN SPACED APART CIRCUMFERENTIALLY AND EXTENDING FROM SAID PASSAGEWAY TO SAID END FACE AND PLURALITY OF OPENINGS SPACED APART CIRCUMFERENTIALLY AND EXTENDING BETWEEN SAID PASSAGEWAY AND SAID AXIAL OPENING.
Claim 2
Dependent Claim
100 words
A LANCE COMPRISING A TUBULAR MEMBER HAVING A BORE WITH A DISCHARGE OPENING AT ITS FORWARD END, A PASSAGEWAY AROUND SAID TUBULAR MEMBER, AND A NOZZLE END SECURED TO THE FORWARD END OF SAID TUBULAR MEMBER, SAID NOZZLE END HAVING AN AXIAL OPENING THERETHROUGH IN AXIAL ALIGNMENT WITH SAID DISCHARGE OPENING AND AN END FACE SURROUNDING THE EXIT END OF SID AXIAL OPENING, SAID NOZZLE END HAVING A PLURALITY OF OPENINGS THEREIN SPACED APART CIRCUMFERENTIALLY AND EXTENDING FROM SAID PASSAGEWAY TO SAID END FACE AND PLURALITY OF OPENINGS SPACED APART CIRCUMFERENTIALLY AND EXTENDING BETWEEN SAID PASSAGEWAY AND SAID AXIAL OPENING.
References Cited (Backward Citations)
US2829960A
Cited
US3010820A
Cited
GB859293A
Cited
US3130252A
Cited
US3161499A
Cited
US3175817A
Cited
US3170016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |