US3352552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory-coated oxygen lance
Assignee: Harbison Walker Refractories Co
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Filing: 1965-07-08
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Granted: 1967-11-14
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Expires: 1985-07-08
Abstract
No abstract record available.
Inventors
- 👤 Koening Edward Walter
- 👤 Gerald R Cope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:22
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; C21C5/4613; C04; C04B; C04B28/00; C04B28/34; C04B28/342
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
AN OXYGEN LANCE CONSTRUCTION COMPRISED OF AN ELONGATE, OPEN-ENDED, TUBULAR, METAL MEMBER, THE MATERIAL OF WHICH SAID METAL MEMBER IS CONSTRUCTED BEING CAPABLE OF REACTING WITH PHOSPHORIC ACID, AND A HARD REFRACTORY SHEATH FIRMLY ANCHORED TO AND SURROUNDING ALL EXTERIOR SURFACES OF SAID METAL MEMBER, SAID REFRACTORY SHEATH BEING MADE FROM A PASTE-LIKE BATCH CONTAINING PHOSPHORIC ACID IN AN AMOUNT SUFFICIENT TO PROVIDE THE EQUIVALENT OF 1525% OF 75% PHOSPHORIC ACID BASED ON THE WEIGHT OF THE SOLIDS IN THE PASTE, THE SOLIDS CONSISTING ESSENTIALLY OF REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF HIGH ALUMINA MATERIALS AND ZIRCON.
Claim 2
Dependent Claim
99 words
AN OXYGEN LANCE CONSTRUCTION COMPRISED OF AN ELONGATE, OPEN-ENDED, TUBULAR, METAL MEMBER, THE MATERIAL OF WHICH SAID METAL MEMBER IS CONSTRUCTED BEING CAPABLE OF REACTING WITH PHOSPHORIC ACID, AND A HARD REFRACTORY SHEATH FIRMLY ANCHORED TO AND SURROUNDING ALL EXTERIOR SURFACES OF SAID METAL MEMBER, SAID REFRACTORY SHEATH BEING MADE FROM A PASTE-LIKE BATCH CONTAINING PHOSPHORIC ACID IN AN AMOUNT SUFFICIENT TO PROVIDE THE EQUIVALENT OF 1525% OF 75% PHOSPHORIC ACID BASED ON THE WEIGHT OF THE SOLIDS IN THE PASTE, THE SOLIDS CONSISTING ESSENTIALLY OF REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF HIGH ALUMINA MATERIALS AND ZIRCON.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |