Patent US2853403A successfully refreshed from Google Patents.
US2853403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing composite metal powders
Assignee: Viridian Inc Canada
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Filing: 1956-04-11
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Granted: 1958-09-23
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Expires: 1976-04-11
Abstract
No abstract record available.
Inventors
- 👤 Mackiw Vladimir Nicolaus
- 👤 Haworth John Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:01
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/24; B22F9/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
THE METHOD OF PRODUCING A COMPOSITE METAL POWDER COMPRISED OF AT LEAST TWO DIFFERENT METALS WHICH COMPRISES DISPERSING SOLID PARTICLES OF A METAL IN AN AMMONIATED SOLUTION IN WHICH SAID PARTICLES ARE INSOLUBLE UNDER REDUCING CONDITIONS AND WHICH CONTAINS, IN SOLUTION, A COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF OSMIUM, RHODIUM, RUTHENIUM, IRRIDIUM, GOLD, PLATINUM, PALLADIUM, SILVER, COPPER, ARSENIC, TIN, NICKEL AND COBALT AND HAVING PROPERTIES WHICH ARE DIFFERENT FROM THOSE OF THE DISPERSED METAL PARTICELS, REACTING THE SOLUTION WITH A REDUCING GAS AT A TEMPERATURE ABOUT 200*F. AND UNDER A POSITIVE PARTIAL PRESSURE OF REDUCING GAS TO PRECIPITATE FROM SAID SOLUTION PARTICLES OF METAL IN ELEMENTAL FORM ON SAID DISPERSED METAL PARTICLES, CONTINUING THE REDUCING REACTION TO COAT SAID DISPERSED METAL PARTICLES WITH SAID PRECIPATED METAL, AND THEREAFTER SEPARATING AND RECOVERING COMPOSITE METAL PARTICLES FROM THE SOLUTION, SAID DISPERSED METAL PARTICLES BEING PRESENT IN SAID SOLUTION DURING THE REDUCING REACTION IN AMOUNT SUFFICIENT TO FORM, WITH SAID PRECIPATED METAL POWDER, A COMPOSITE METAL POWDER ADAPTED TO BE COMPACTED.
Claim 2
Independent Claim
172 words
THE METHOD OF PRODUCING A COMPOSITE METAL POWDER COMPRISED OF AT LEAST TWO DIFFERENT METALS WHICH COMPRISES DISPERSING SOLID PARTICLES OF A METAL IN AN AMMONIATED SOLUTION IN WHICH SAID PARTICLES ARE INSOLUBLE UNDER REDUCING CONDITIONS AND WHICH CONTAINS, IN SOLUTION, A COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF OSMIUM, RHODIUM, RUTHENIUM, IRRIDIUM, GOLD, PLATINUM, PALLADIUM, SILVER, COPPER, ARSENIC, TIN, NICKEL AND COBALT AND HAVING PROPERTIES WHICH ARE DIFFERENT FROM THOSE OF THE DISPERSED METAL PARTICELS, REACTING THE SOLUTION WITH A REDUCING GAS AT A TEMPERATURE ABOUT 200*F. AND UNDER A POSITIVE PARTIAL PRESSURE OF REDUCING GAS TO PRECIPITATE FROM SAID SOLUTION PARTICLES OF METAL IN ELEMENTAL FORM ON SAID DISPERSED METAL PARTICLES, CONTINUING THE REDUCING REACTION TO COAT SAID DISPERSED METAL PARTICLES WITH SAID PRECIPATED METAL, AND THEREAFTER SEPARATING AND RECOVERING COMPOSITE METAL PARTICLES FROM THE SOLUTION, SAID DISPERSED METAL PARTICLES BEING PRESENT IN SAID SOLUTION DURING THE REDUCING REACTION IN AMOUNT SUFFICIENT TO FORM, WITH SAID PRECIPATED METAL POWDER, A COMPOSITE METAL POWDER ADAPTED TO BE COMPACTED.
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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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |