US3293334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of spherical metal powder
Assignee: Reynolds Metals Co
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Filing: 1962-08-16
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Granted: 1966-12-20
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Expires: 1982-08-16
Abstract
No abstract record available.
Inventors
- 👤 Linton D Bylund
- 👤 Francis B Rethwisch
- 👤 William P Woosley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:35
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; G; G01; G01N; G01N33/00; G01N33/20; G01N33/202; G01N33/2022; G01N33/2025; Y; Y10; Y10S; Y10S75/00; Y10S75/953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
METHOD OF PRODUCING SPHERICAL METAL POWDER, WHICH COMPRISES SUBJECTING MOLTEN METAL TO THE ACTION OF A HIGH VELOCITY STREAM OF EXOTHERMIC GAS CONTAINING NITROGEN AND CARBON DIOXIDE, TO DISINTEGRATE THE METAL INTO FINE PARTICLES, SAID GAS PROVIDING AVAILABLE OXYGEN IN AN AMOUNT INSUFFICIENT TO INTERFERE WITH SURFACE TENSION FORCES OF THE PARTICLES EFFECTING SPHERE FORMATION, AND PASSING SAID GAS STREAM AND THE PARTICLES OF MOLTEN METAL THROUGH A SPHERODIZING ZONE TO CAUSE SPHERE FORMATION AND SOLIDIFICATION OF THE SPHERICAL PARTICLES.
Claim 2
Dependent Claim
80 words
METHOD OF PRODUCING SPHERICAL METAL POWDER, WHICH COMPRISES SUBJECTING MOLTEN METAL TO THE ACTION OF A HIGH VELOCITY STREAM OF EXOTHERMIC GAS CONTAINING NITROGEN AND CARBON DIOXIDE, TO DISINTEGRATE THE METAL INTO FINE PARTICLES, SAID GAS PROVIDING AVAILABLE OXYGEN IN AN AMOUNT INSUFFICIENT TO INTERFERE WITH SURFACE TENSION FORCES OF THE PARTICLES EFFECTING SPHERE FORMATION, AND PASSING SAID GAS STREAM AND THE PARTICLES OF MOLTEN METAL THROUGH A SPHERODIZING ZONE TO CAUSE SPHERE FORMATION AND SOLIDIFICATION OF THE SPHERICAL PARTICLES.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |