US3034885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of refining pig iron and a fining vessel for performing the method
Assignee: Kloeckner Werke AG
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Filing: 1958-08-07
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Granted: 1962-05-15
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Expires: 1978-08-07
Abstract
No abstract record available.
Inventors
- 👤 Hardt Paul Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:27
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; C21C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A METHOD OF REFINING PIG IRON IN A HORIZONTAL REFINING VESSEL HAVING A CHAMBER OF NON-CIRCULAR CROSS SECTION BY BLOWING OXYGEN ON THE IRON BATH IN SAID VESSEL, IN COMBINATION THEREWITH, THE IMPROVEMENT COMPRISING THE STEPS OF: ROTATING SAID VESSEL THROUGHOUT A FIRST PHASE OF THE REFINING OPERATION DURING WHICH DEPHOSPHORIZATION TAKES PLACE, AT A RATE WHICH INHIBITS DECARBURIZATION OF THE IRON BATH; AND THEREAFTER, THROUGHOUT A SUBSEQUENT PHASE OF THE REFINING OPERATION, ROTATING SAID VESSEL AT A SUBSTAN-
Claim 2
Dependent Claim
80 words
IN A METHOD OF REFINING PIG IRON IN A HORIZONTAL REFINING VESSEL HAVING A CHAMBER OF NON-CIRCULAR CROSS SECTION BY BLOWING OXYGEN ON THE IRON BATH IN SAID VESSEL, IN COMBINATION THEREWITH, THE IMPROVEMENT COMPRISING THE STEPS OF: ROTATING SAID VESSEL THROUGHOUT A FIRST PHASE OF THE REFINING OPERATION DURING WHICH DEPHOSPHORIZATION TAKES PLACE, AT A RATE WHICH INHIBITS DECARBURIZATION OF THE IRON BATH; AND THEREAFTER, THROUGHOUT A SUBSEQUENT PHASE OF THE REFINING OPERATION, ROTATING SAID VESSEL AT A SUBSTAN-
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) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |