Patent US3290723A successfully refreshed from Google Patents.
US3290723A
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US
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Apparatus for processing particulate material
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1963-10-23
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Granted: 1966-12-13
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jaques Thomas Arthur John
- 👤 Sturge Derek William James
- 👤 Smyth Richard Terrance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:57
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/02; B01J2/06; B22; B22F; B22F1/00; B22F1/06; B22F1/065; G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/42; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PROCESS FOR SPHEROIDISING PARTICULATE MATERIAL WHICH RESIDES IN PREPARING A BATCH OF IRREGULARLY SHAPED PARTICLES THE VOLUME OF EACH APPROXIMATING TO THAT OF A SPHERICAL PARTICLE OF THE REQUIRED DIAMETER, CAUSING THE PARTICLES TO BECOME ENTRAINED IN A STREAM OF INERT GAS HAVING A HIGH HEAT TRANSFER COEFFICIENT, FLOWING THE GAS WITH ITS PARTICLES ENTRAINED THEREIN ALONG A FLOWPATH, INITIATING A ZONE OF HOT GAS PLASMA THROUGH A CONSTRICTION IN THE FLOW PATH WHILST AN ELECTRICAL POTENTIAL IS MAINTAINED ACROSS THE CONSTRICTION IN SAID FLOWPATH TO MELT THE PARTICLES WHEREBY THE LATTER ASSUME A SPHERICAL SHAPE, PASSING THE MELTED PARTICLES IN FREE FLIGHT TO A COOL ZONE AND COLLECTING THE PARTICLES IN THE COOL ZONE AND INCLUDING THE STEP OF INITIALLY REDUCING THE PRESSURE IN THE FLOW PATH BELOW ATMOSHERIC BEFORE INTRODUCING THE GAS WITH ENTRAINED PARTICLES.
Claim 2
Dependent Claim
138 words
A PROCESS FOR SPHEROIDISING PARTICULATE MATERIAL WHICH RESIDES IN PREPARING A BATCH OF IRREGULARLY SHAPED PARTICLES THE VOLUME OF EACH APPROXIMATING TO THAT OF A SPHERICAL PARTICLE OF THE REQUIRED DIAMETER, CAUSING THE PARTICLES TO BECOME ENTRAINED IN A STREAM OF INERT GAS HAVING A HIGH HEAT TRANSFER COEFFICIENT, FLOWING THE GAS WITH ITS PARTICLES ENTRAINED THEREIN ALONG A FLOWPATH, INITIATING A ZONE OF HOT GAS PLASMA THROUGH A CONSTRICTION IN THE FLOW PATH WHILST AN ELECTRICAL POTENTIAL IS MAINTAINED ACROSS THE CONSTRICTION IN SAID FLOWPATH TO MELT THE PARTICLES WHEREBY THE LATTER ASSUME A SPHERICAL SHAPE, PASSING THE MELTED PARTICLES IN FREE FLIGHT TO A COOL ZONE AND COLLECTING THE PARTICLES IN THE COOL ZONE AND INCLUDING THE STEP OF INITIALLY REDUCING THE PRESSURE IN THE FLOW PATH BELOW ATMOSHERIC BEFORE INTRODUCING THE GAS WITH ENTRAINED PARTICLES.
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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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |