US2597701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing finely divided metals
Assignee: GAF Chemicals Corp
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Filing: 1948-12-06
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Granted: 1952-05-20
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Expires: 1968-12-06
Abstract
No abstract record available.
Inventors
- 👤 Beller Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:35
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/30; B22F9/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN THE PRODUCTION OF FINE METAL POWDERS BY THERMALLY DECOMPOSING A METAL CARBONYL, THE STEP OF CONTROLLING SUBSTANTIALLY ALL OF THE DISTRIBUTION OF THE AVERAGE PARTICLE SIZE WITHIN A RANGE OF ABOUT 2 MICRONS AND THE MAXIMUM PARTICLE SIZE TO A SMALL AMOUNT ABOVE THE AVERAGE, SAID MAXIMUM SIZE BEING NO MORE THAN ABOUT 3 TO 4 MICRONS LARGER THAN THE AVERAGE, WHICH PARTICLES ARE PRODUCED BY LIMITING THE CONTACT IN THE DECOMPOSITION SPACE OF UNDECOMPOSED METAL CARBONYL WITH THE METAL PARTICLES FORMED IN THE REACTION TO A DEFINITE LENGTH OF TIME NOT EXCEEDING 20 SECONDS SPECIFICALLY FOR THE DESIRED AVERAGE AND MAXIMUM PARTICLE SIZE OF THE POWDER PRODUCED AT A REACTION TEMPERATURE OF 150-350* C. AND A PRESSURE FROM 20 MM. TO 100 MM. ABSOLUTE.
Claim 2
Dependent Claim
126 words
IN THE PRODUCTION OF FINE METAL POWDERS BY THERMALLY DECOMPOSING A METAL CARBONYL, THE STEP OF CONTROLLING SUBSTANTIALLY ALL OF THE DISTRIBUTION OF THE AVERAGE PARTICLE SIZE WITHIN A RANGE OF ABOUT 2 MICRONS AND THE MAXIMUM PARTICLE SIZE TO A SMALL AMOUNT ABOVE THE AVERAGE, SAID MAXIMUM SIZE BEING NO MORE THAN ABOUT 3 TO 4 MICRONS LARGER THAN THE AVERAGE, WHICH PARTICLES ARE PRODUCED BY LIMITING THE CONTACT IN THE DECOMPOSITION SPACE OF UNDECOMPOSED METAL CARBONYL WITH THE METAL PARTICLES FORMED IN THE REACTION TO A DEFINITE LENGTH OF TIME NOT EXCEEDING 20 SECONDS SPECIFICALLY FOR THE DESIRED AVERAGE AND MAXIMUM PARTICLE SIZE OF THE POWDER PRODUCED AT A REACTION TEMPERATURE OF 150-350* C. AND A PRESSURE FROM 20 MM. TO 100 MM. ABSOLUTE.
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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |