Patent US3326672A successfully refreshed from Google Patents.
US3326672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of metals and alloys
Assignee: Farnsfield Ltd
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Filing: 1964-08-17
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Granted: 1967-06-20
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Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Worner Howard Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:17
CPC Classifications
C; C22; C22B; C22B19/00; C22B19/04; C03; C03B; C03B5/00; C03B5/04; C03B5/12; C21; C21B; C21B13/00; C21B13/10; C21C; C21C1/00; C21C5/00; C21C5/28; C21C5/42; C21C5/56; C21C5/567; C22B13/00; C22B15/00; C22B15/0026; C22B15/0028; C22B15/003; C22B15/0045; C22B15/0054; C22B15/006; C22B23/00; C22B23/02; C22B23/025; C22B25/00; C22B5/00; C22B9/00; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y10; Y10S; Y10S75/00; Y10S75/957
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A METHOD OF REFINING METALS WHICH COMPRISES THE STEPS OF: INTRODUCING UNREFINED METAL INTO THE REFINING CHAMBER OF A REFINING FURNACE, FLOWING THE METAL THROUGH THE REFINING A CHAMBER TO A METAL OUTLET, INJECTING OXYGENCONTAINING GAS INTO THE FLOWING METAL IN THE REFINING CHAMBER DURING THE FLOW OF METAL THERETHROUGH; MAINTAINING TURBULENT AGITATION IN THE MOLTEN METAL IN THE REFINING CHAMBER BY THE INJECTION OF THE OXYGEN-CONTAINING GAS; INDUCING FLOW OF SLAG COUNTERCURRENTLY TO THE FLOW OF METAL IN AT LEAST A PART OF THE REFINING CHAMBER; FLOWING THE SLAG FORMED IN THE REFINING CHAMBER INTO A SLAG SEPARATION CHAMBER WHICH COMMUNICATES WITH THE REFINING CHAMBER; MAINTAINING SUBSTANTIALLY QUIESCENT CONDITIONS IN THE SLAG SEPARATION CHAMBER; DISCHARGING SLAG FROM A SLAG OUTLET IN THE SLAG SEPARATION CHAMBER; AND DISCHARGING REFINED METAL FROM THE METAL OUTLET.
Claim 2
Independent Claim
134 words
A METHOD OF REFINING METALS WHICH COMPRISES THE STEPS OF: INTRODUCING UNREFINED METAL INTO THE REFINING CHAMBER OF A REFINING FURNACE, FLOWING THE METAL THROUGH THE REFINING A CHAMBER TO A METAL OUTLET, INJECTING OXYGENCONTAINING GAS INTO THE FLOWING METAL IN THE REFINING CHAMBER DURING THE FLOW OF METAL THERETHROUGH; MAINTAINING TURBULENT AGITATION IN THE MOLTEN METAL IN THE REFINING CHAMBER BY THE INJECTION OF THE OXYGEN-CONTAINING GAS; INDUCING FLOW OF SLAG COUNTERCURRENTLY TO THE FLOW OF METAL IN AT LEAST A PART OF THE REFINING CHAMBER; FLOWING THE SLAG FORMED IN THE REFINING CHAMBER INTO A SLAG SEPARATION CHAMBER WHICH COMMUNICATES WITH THE REFINING CHAMBER; MAINTAINING SUBSTANTIALLY QUIESCENT CONDITIONS IN THE SLAG SEPARATION CHAMBER; DISCHARGING SLAG FROM A SLAG OUTLET IN THE SLAG SEPARATION CHAMBER; AND DISCHARGING REFINED METAL FROM THE METAL OUTLET.
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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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |