Patent US3171009A successfully refreshed from Google Patents.
US3171009A
Expired / Lapsed
US
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Heat treatment of high-melting solids in fine particle form
Assignee: BASF Schweiz AG
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Filing: 1961-04-24
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Granted: 1965-02-23
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Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 Schelier Walter
- 👤 Paul Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:54
CPC Classifications
B; B22; B22F; B22F9/00; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J8/00; B01J8/18; B01J8/24; B01J8/42; B22F1/00; B22F1/14; B22F1/17; C; C01; C01B; C01B19/00; C01B19/007; C01B21/00; C01B21/06; C01B25/00; C01B25/06; C01B32/00; C01B32/90; C01B35/00; C01B35/02; C01B35/026; C01B35/04; C01B6/00; C01G; C01G1/00; C01G1/12; C21; C21D; C21D1/00; C21D1/34; C21D1/53; C22; C22B; C22B1/00; C22B1/02; C22B1/10; C22B5/00; C22B5/02; C22B5/12; C22B5/14; C22C; C22C1/00; C22C1/007; C23; C23C; C23C16/00; C23C16/44; C23C16/442; H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; B22F2999/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
247 words
AN APPARATUS FOR HEATING AND CAUSING TO GROW, FINEGRAINED SOLID PARTICLES OF A METAL SELECTED FROM THE GROUP CONSISTING OF TANTALUM, NIOBIUM, TUNGSTEN, MOLYBDENUM, VANADIUM AND RHENIUM, SAID APPARATUS BEING ADAPTED TO SUSPENDING SAID PARTICLES IN A FLUIDIZING GAS STREAM AND HEATING SAID PARTICLES TO A TEMPERATURE IN THE ZONE OF THE RECRYSTALLIZATION TEMPERATURE OF SAID METAL, SAID APPARATUS COMPRISING A CYLINDRICAL, VERTICALLY ARRANGED CAVITY RESONATOR CONNECTED BY INDUCTIVE COUPLING MEANS TO, AND IN RESONANCE WITH, A SOURCE OF HIGH-FREQUENCY ELECTROMAGNETIC WAVES THE FREQUENCY OF SAID WAVES BEING HIGHER THAN 1000 MEGACYCLES PER SECOND AND SAID COUPLING MEANS BEING ADAPTED TO EXCITE IN SAID CAVITY A STANDING WAVE WITH THE E11-MODE, WHEREBY THE EFFECTIVE MAGNETIC COMPONENT OF SAID STANDING WAVE HAS ITS MAXIMUM AMOUNT IN THE AXIS OF SAID CAVITY AND WHEREIN THE AVERAGE PARTICLE SIZE AND THE FREQUENCY OF SAID WAVES ARE IN SUCH RELATION THAT THE AVERAGE PARTICLE RADIUM IS SUBSTANTIALLY EQUAL TO 1 TO 5 TIMES THE PENETRATION DEPTH OF EDDY CURRENTS GENERATED IN SAID PARTICLES BY THE MAGNETIC FIELD OF SAID STANDING WAVE, SAID APPARATUS FURTHER COMPRISING A GAS INLET NOZZLE LOCATED CENTRALLY IN THE BOTTOM END OF SAID CAVITY RESONATOR FOR INTRODUCING A SUBSTANTIALLY AXIAL GAS STREAM, A GAS OUTLET OPENING IN THE UPPER END OF SAID CAVITY, MEANS FOR CONFINING THE DIAMETER OF SAID GAS STREAM TO LESS THAN TWO THIRDS OF THE DIAMETER OF SAID CAVITY, AND MEANS FOR COLLECTING THE GROWN PARTICLES AT THE BOTTOM END OF SAID CAVITY
Claim 2
Independent Claim
247 words
AN APPARATUS FOR HEATING AND CAUSING TO GROW, FINEGRAINED SOLID PARTICLES OF A METAL SELECTED FROM THE GROUP CONSISTING OF TANTALUM, NIOBIUM, TUNGSTEN, MOLYBDENUM, VANADIUM AND RHENIUM, SAID APPARATUS BEING ADAPTED TO SUSPENDING SAID PARTICLES IN A FLUIDIZING GAS STREAM AND HEATING SAID PARTICLES TO A TEMPERATURE IN THE ZONE OF THE RECRYSTALLIZATION TEMPERATURE OF SAID METAL, SAID APPARATUS COMPRISING A CYLINDRICAL, VERTICALLY ARRANGED CAVITY RESONATOR CONNECTED BY INDUCTIVE COUPLING MEANS TO, AND IN RESONANCE WITH, A SOURCE OF HIGH-FREQUENCY ELECTROMAGNETIC WAVES THE FREQUENCY OF SAID WAVES BEING HIGHER THAN 1000 MEGACYCLES PER SECOND AND SAID COUPLING MEANS BEING ADAPTED TO EXCITE IN SAID CAVITY A STANDING WAVE WITH THE E11-MODE, WHEREBY THE EFFECTIVE MAGNETIC COMPONENT OF SAID STANDING WAVE HAS ITS MAXIMUM AMOUNT IN THE AXIS OF SAID CAVITY AND WHEREIN THE AVERAGE PARTICLE SIZE AND THE FREQUENCY OF SAID WAVES ARE IN SUCH RELATION THAT THE AVERAGE PARTICLE RADIUM IS SUBSTANTIALLY EQUAL TO 1 TO 5 TIMES THE PENETRATION DEPTH OF EDDY CURRENTS GENERATED IN SAID PARTICLES BY THE MAGNETIC FIELD OF SAID STANDING WAVE, SAID APPARATUS FURTHER COMPRISING A GAS INLET NOZZLE LOCATED CENTRALLY IN THE BOTTOM END OF SAID CAVITY RESONATOR FOR INTRODUCING A SUBSTANTIALLY AXIAL GAS STREAM, A GAS OUTLET OPENING IN THE UPPER END OF SAID CAVITY, MEANS FOR CONFINING THE DIAMETER OF SAID GAS STREAM TO LESS THAN TWO THIRDS OF THE DIAMETER OF SAID CAVITY, AND MEANS FOR COLLECTING THE GROWN PARTICLES AT THE BOTTOM END OF SAID CAVITY
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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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |