US3015852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of spheroidizing irregularly shaped particles
Assignee: South African Iron & Steel
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Filing: 1958-03-26
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Granted: 1962-01-09
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Expires: 1978-03-26
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Daniel Jakobus Nicolas
- 👤 Beeton Thomas Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/02; B01J2/04; B22; B22F; B22F1/00; B22F1/06; B22F1/065; Y; Y10; Y10S; Y10S425/00; Y10S425/101; Y10S75/00; Y10S75/953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR SPHEROIDIZING IRREGULARY SHAPED FERROSILICON PARTICLES WHICH COMPRISES PASSING A GAS CONTAINING FREE OXYGEN IN AT LEAST THE PROPORTION CONTAINED IN AIR INTO THE CENTRAL PASSAGE OF A DOWNWARDLY DIRECTED FLAMEPRODUCING NOZZLE, INTRODUCING A COMBUSTIBLE GAS THROUGH AN ANNULAR PASSAGE IN SAID NOZZLE SURROUNDING THE SAID CENTRAL PASSAGE AT ITS OUTLET, THUS PRODUCING A DOWNWARDLY DIRECTED FLAME HAVING A REDUCING ZONE AT LEAST TOWARDS ITS PERIMETER, FEEDING THE IRREGULARLY SHAPED FERRO-SILICON
Claim 2
Dependent Claim
73 words
A PROCESS FOR SPHEROIDIZING IRREGULARY SHAPED FERROSILICON PARTICLES WHICH COMPRISES PASSING A GAS CONTAINING FREE OXYGEN IN AT LEAST THE PROPORTION CONTAINED IN AIR INTO THE CENTRAL PASSAGE OF A DOWNWARDLY DIRECTED FLAMEPRODUCING NOZZLE, INTRODUCING A COMBUSTIBLE GAS THROUGH AN ANNULAR PASSAGE IN SAID NOZZLE SURROUNDING THE SAID CENTRAL PASSAGE AT ITS OUTLET, THUS PRODUCING A DOWNWARDLY DIRECTED FLAME HAVING A REDUCING ZONE AT LEAST TOWARDS ITS PERIMETER, FEEDING THE IRREGULARLY SHAPED FERRO-SILICON
References Cited (Backward Citations)
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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) | 1965-01-08 | 1965-07-10 | 1966-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-08 | 1969-07-10 | 1970-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-08 | 1973-07-10 | 1974-01-09 | $7700.00 | Window Closed / Lapsed |