US3293333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fine spherical metal particles
Assignee: Reynolds Metals Co
•
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
- 👤 William P Woosley
- 👤 John S Connor
- 👤 Jr Vincent E Furnas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:00
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; Y; Y10; Y10S; Y10S75/00; Y10S75/953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
METHOD FOR THE PRODUCTION OF FINE SPHERICAL METAL PARTICLES WHICH COMPRISES SUBJECTING MOLTEN METAL TO THE ACTION OF A HIGH VELOCITY STREAM OF GAS INERT TO SAID METAL, TO DISINTEGRATE THE METAL INTO FINE PARTICLES, DISCHARGING THE MOLTEN METAL PARTICLES AND SAID GAS STREAM INTO AN ENCLOSED COOLING ZONE HAVING AN ATMOSPHERE OF EXOTHERMIC GAS CONTAINING NITROGEN AND CARBON DIOXIDE, SAID EXOTHERMIC GAS PROVIDING AVAILABLE OXYGEN IN AN AMOUNT INSUFFICIENT TO INTERFERE WITH NORMAL SURFACE TENSION FORCES OF THE PARTICLES CAUSING SPHERE FORMATION, ALLOWING THE PARTICLES TO ASSUME SPHERICAL SHAPE IN SAID ATMOSPHERE, AND EXPOSING THE SPHERICAL PARTICLES TO INERT GAS CONTAINING ABOUT 5% FREE OXYGEN BY VOLUME.
Claim 2
Dependent Claim
108 words
METHOD FOR THE PRODUCTION OF FINE SPHERICAL METAL PARTICLES WHICH COMPRISES SUBJECTING MOLTEN METAL TO THE ACTION OF A HIGH VELOCITY STREAM OF GAS INERT TO SAID METAL, TO DISINTEGRATE THE METAL INTO FINE PARTICLES, DISCHARGING THE MOLTEN METAL PARTICLES AND SAID GAS STREAM INTO AN ENCLOSED COOLING ZONE HAVING AN ATMOSPHERE OF EXOTHERMIC GAS CONTAINING NITROGEN AND CARBON DIOXIDE, SAID EXOTHERMIC GAS PROVIDING AVAILABLE OXYGEN IN AN AMOUNT INSUFFICIENT TO INTERFERE WITH NORMAL SURFACE TENSION FORCES OF THE PARTICLES CAUSING SPHERE FORMATION, ALLOWING THE PARTICLES TO ASSUME SPHERICAL SHAPE IN SAID ATMOSPHERE, AND EXPOSING THE SPHERICAL PARTICLES TO INERT GAS CONTAINING ABOUT 5% FREE OXYGEN BY VOLUME.
References Cited (Backward Citations)
USRE22494E
Cited
US2267970A
Cited
US2538345A
Cited
US2529466A
Cited
US2638630A
Cited
US3070837A
Cited
US2852126A
Cited
US3071804A
Cited
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 |