US2805149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of oxides to metal
Assignee: Wyeth Holdings LLC
•
Filing: 1957-01-16
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Granted: 1957-09-03
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Expires: 1977-01-16
Abstract
No abstract record available.
Inventors
- 👤 Felix A Schaufelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:26
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0453; C22B23/0461
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF PRODUCING ELEMENTAL METAL AS A POWDER OF FINE, UNIFORM PARTICLE SIZE WHICH COMPRISES: PREPARING A CONCENTRATED SLURRY IN WATER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CUPROUS, NICKELOUS AND COBALTOUS OXIDES AND HYDROXIDES, THE SOLIDS CONTENT OF SAID SLURRY BEING NOT MORE THAN ABOUT 50%; TREATING SAID SLURRY BY SUBJECTING IT TO A TEMPERATURE OF ABOUT 100*-500*F., A TOTAL PRESSURE NOT EXCEEDING ABOUT 1000 P.S.I.G. AND A PARTIAL PRESSURE OF AT LEAST 100 P.S.I.G. OF AN NON-SULIDIZING REDUCING GAS WHEREBY SAID SUSPENDED COMPOUND IS REDUCED TO ELEMENTAL FORM, SAID SLURRY BEING AGITATED DURING SAID TREATMENT; CONTINUING TREATMENT UNTIL REDUCTION TO METAL IS SUBSTANTIALLY COMPLETE; COOLING RESULTANT SLURRY AND COLLECTING ELEMENTAL METAL PRODUCT.
Claim 2
Independent Claim
117 words
A METHOD OF PRODUCING ELEMENTAL METAL AS A POWDER OF FINE, UNIFORM PARTICLE SIZE WHICH COMPRISES: PREPARING A CONCENTRATED SLURRY IN WATER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CUPROUS, NICKELOUS AND COBALTOUS OXIDES AND HYDROXIDES, THE SOLIDS CONTENT OF SAID SLURRY BEING NOT MORE THAN ABOUT 50%; TREATING SAID SLURRY BY SUBJECTING IT TO A TEMPERATURE OF ABOUT 100*-500*F., A TOTAL PRESSURE NOT EXCEEDING ABOUT 1000 P.S.I.G. AND A PARTIAL PRESSURE OF AT LEAST 100 P.S.I.G. OF AN NON-SULIDIZING REDUCING GAS WHEREBY SAID SUSPENDED COMPOUND IS REDUCED TO ELEMENTAL FORM, SAID SLURRY BEING AGITATED DURING SAID TREATMENT; CONTINUING TREATMENT UNTIL REDUCTION TO METAL IS SUBSTANTIALLY COMPLETE; COOLING RESULTANT SLURRY AND COLLECTING ELEMENTAL METAL PRODUCT.
References Cited (Backward Citations)
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US1686391A
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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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |