US3211548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of tantalum or niobium in a hydrogen plasma jet
Assignee: BASF Schweiz AG
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Filing: 1962-11-21
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Granted: 1965-10-12
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Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 Scheller Walter
- 👤 Beguin Claude
- 👤 Schuett Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/24; B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; C22B4/00; C22B4/005; C23; C23C; C23C16/00; C23C16/06; C23C16/08; C23C16/14; C23C16/44; C23C16/50; C23C16/513; H; H01; H01J; H01J37/00; H01J37/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR REDUCING A METAL CHLORIDE WITH HYDROGEN SELECTED FROM THE GROUP CONSISTING OF TANTAIUM PENTACHLORIDE AND NIOBIUM PENTACHLORIDE IN WHICH PROCESS THE CHLORIDE IS INTRODUCED INTO A HYDROGEN PLASMA AND THE REDUCTION IS CARRIED OUT IN THE PRESENCE OF A CONDENSED SUBSTANCE, HAVING A VAPOR PRESSURE WHICH ENABLES THE SUBSTANCE TO REMAIN SUBSTANNTIALLY IN CONDENSED STAE AT REACTION CONDITIONS, HAVING A PARTICLE SIZE SMALLER THAN 500 MICRONS AND BEING DISPERSED IN THE HYDROGEN JET, THE CONTACT OF THE DISPERSED SUBSTANCE WITH THE HYDROGEN JET RANGES FROM 10**-2 TO 10**-4 SECOND AND THE REACTION TEMPERATURE IS BETWEEN 2000 AND 5000*C.
Claim 2
Dependent Claim
101 words
A PROCESS FOR REDUCING A METAL CHLORIDE WITH HYDROGEN SELECTED FROM THE GROUP CONSISTING OF TANTAIUM PENTACHLORIDE AND NIOBIUM PENTACHLORIDE IN WHICH PROCESS THE CHLORIDE IS INTRODUCED INTO A HYDROGEN PLASMA AND THE REDUCTION IS CARRIED OUT IN THE PRESENCE OF A CONDENSED SUBSTANCE, HAVING A VAPOR PRESSURE WHICH ENABLES THE SUBSTANCE TO REMAIN SUBSTANNTIALLY IN CONDENSED STAE AT REACTION CONDITIONS, HAVING A PARTICLE SIZE SMALLER THAN 500 MICRONS AND BEING DISPERSED IN THE HYDROGEN JET, THE CONTACT OF THE DISPERSED SUBSTANCE WITH THE HYDROGEN JET RANGES FROM 10**-2 TO 10**-4 SECOND AND THE REACTION TEMPERATURE IS BETWEEN 2000 AND 5000*C.
References Cited (Backward Citations)
US2761776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |