US2900245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of finely divided metals
Assignee: GAF Chemicals Corp
•
Filing: 1957-01-24
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Granted: 1959-08-18
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Expires: 1977-01-24
Abstract
No abstract record available.
Inventors
- 👤 Beller Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:12
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/30; B22F9/305; C; C22; C22B; C22B23/00; C22B23/06; C22B23/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
PROCESS FOR THE PRODUCTION OF FINE METAL POWDERS BY THERMALLY DECOMPOSING A METAL CARBONYL, WHICH COMPRISES INTRODUCING A VAPORIZED METAL CARBONYL INTO A MOVING STREAM OF INERT GAS CIRCULATING IN A RELATIVELY CLOSED SYSTEM, SO AS TO CAUSE A HIGHLY DILUTE MIXTURE OF INERT GAS AND METAL CARBONYL VAPOR TO BE FORMED, CONTINUOUSLY PASSING THE RESULTING MIXTURE THROUGH A REACTION ZONE, MAINTAINED AT A TEMPERATURE OF 150 TO 350*C. AND AT A PRESSURE OF 2 MM. TO 2 ATMOSPHERES, UNDER STREAMLINED CONDITIONS OF FLOW WITHOUT TURBULENCE WHEREBY DECOMPOSITION OF THE METAL CARBONYL IS EFFECTED WITH THE PRODUCTION OF METAL PARTICULES AND CARBON MONOXIDE, REMOVING THE PRODUCTS OF DECOMPOSITION TOGETHER WITH SAID INERT
Claim 2
Dependent Claim
112 words
PROCESS FOR THE PRODUCTION OF FINE METAL POWDERS BY THERMALLY DECOMPOSING A METAL CARBONYL, WHICH COMPRISES INTRODUCING A VAPORIZED METAL CARBONYL INTO A MOVING STREAM OF INERT GAS CIRCULATING IN A RELATIVELY CLOSED SYSTEM, SO AS TO CAUSE A HIGHLY DILUTE MIXTURE OF INERT GAS AND METAL CARBONYL VAPOR TO BE FORMED, CONTINUOUSLY PASSING THE RESULTING MIXTURE THROUGH A REACTION ZONE, MAINTAINED AT A TEMPERATURE OF 150 TO 350*C. AND AT A PRESSURE OF 2 MM. TO 2 ATMOSPHERES, UNDER STREAMLINED CONDITIONS OF FLOW WITHOUT TURBULENCE WHEREBY DECOMPOSITION OF THE METAL CARBONYL IS EFFECTED WITH THE PRODUCTION OF METAL PARTICULES AND CARBON MONOXIDE, REMOVING THE PRODUCTS OF DECOMPOSITION TOGETHER WITH SAID INERT
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |