US2790710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing metal oxides
Assignee: Ortech Corp
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Filing: 1954-06-18
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Granted: 1957-04-30
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Expires: 1974-06-18
Abstract
No abstract record available.
Inventors
- 👤 Patrick E Cavanagh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:54
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0046; C21B13/0053; C22; C22B; C22B5/00; C22B5/02; C22B5/12; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF REDUCING PARTICLES OF OXYGEN BEARING METAL CONTAINING MATERIAL TO METALLIC FORM WITH A REDUCING GAS, COMPRISING: FORMING WITH SAID PARTICLES A GAS PERMEABLE BED HAVING VOIDS AND OF A SHALLOW DEPTH DEFINED BY GAS ENTRY AND EXIT SURFACES THEREOF; ISOLATING SAID BED FROM THE ATMOSPHERE; HEATING SAID ISOLATED BED TO A REDUCING TEMPERATURE LESS THAN SUFFICIENT TO SUBSTANTIALLY CLOSE THE VOIDS THEREOF DUE TO MELTING OF SAID PARTICLES; REGENERATIVELY PASSING A REDUCING GAS THROUGH SAID BED FROM THE ENTRY TO THE EXIT SURFACES THEREOF; AND REMOVING REDUCING REACTION PRODUCTS FROM SAID GAS AT A RATE CORRESPONDING TO THE RATE OF FORMATION OF SAID PRODUCTS DURING PASSAGE OF SAID GAS THROUGH SAID BED.
Claim 2
Independent Claim
115 words
THE METHOD OF REDUCING PARTICLES OF OXYGEN BEARING METAL CONTAINING MATERIAL TO METALLIC FORM WITH A REDUCING GAS, COMPRISING: FORMING WITH SAID PARTICLES A GAS PERMEABLE BED HAVING VOIDS AND OF A SHALLOW DEPTH DEFINED BY GAS ENTRY AND EXIT SURFACES THEREOF; ISOLATING SAID BED FROM THE ATMOSPHERE; HEATING SAID ISOLATED BED TO A REDUCING TEMPERATURE LESS THAN SUFFICIENT TO SUBSTANTIALLY CLOSE THE VOIDS THEREOF DUE TO MELTING OF SAID PARTICLES; REGENERATIVELY PASSING A REDUCING GAS THROUGH SAID BED FROM THE ENTRY TO THE EXIT SURFACES THEREOF; AND REMOVING REDUCING REACTION PRODUCTS FROM SAID GAS AT A RATE CORRESPONDING TO THE RATE OF FORMATION OF SAID PRODUCTS DURING PASSAGE OF SAID GAS THROUGH SAID BED.
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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |