Patent US3554845A successfully refreshed from Google Patents.
Patent US3020148A successfully refreshed from Google Patents.
US3020148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of refractory metals
Assignee: EIDP Inc
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Filing: 1960-04-05
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Granted: 1962-02-06
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Expires: 1980-04-05
Abstract
No abstract record available.
Inventors
- 👤 Ii Wilmer A Jenkins
- 👤 Howard W Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:11
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD FOR PRODUCING IN ELEMENTAL STATE A METAL SELECTED FROM THE GROUP CONSISTING OF NIOBIUM, TANTALUM AND TUNGSTEN COMPRISING REACTION A CHLORIDE OF SAID METAL WITH HYDROGEN IN A CLOSED REACTION CHAMBR AND AT TEMPERATURES RANGING FROM 700-950*C., DURING THE REACTION MAINTAINING IN SAID CHAMBER A FLUIDIZED SUSPENSION OF FINELY DIVIDED SOLID PARTICLES OF THE METAL UNDER PRODUCTION UPON THE SURFACES OF WHICH THE METAL BEING FORMED IN THE REACTION WILL DEPOSIT, EMPLOYING IN SAID REACTION A MOLE RATIO OF HYDROGEN TO METAL CHLORIDE OF BETWEEN 50/1 AND 225/1 WHEN NIOBIUM IS BEING PRODUCED, OF BETWEEN 100/1 AND 225/1 WHEN TANTALUM IS BEING PRODUCED,
Claim 2
Independent Claim
105 words
A METHOD FOR PRODUCING IN ELEMENTAL STATE A METAL SELECTED FROM THE GROUP CONSISTING OF NIOBIUM, TANTALUM AND TUNGSTEN COMPRISING REACTION A CHLORIDE OF SAID METAL WITH HYDROGEN IN A CLOSED REACTION CHAMBR AND AT TEMPERATURES RANGING FROM 700-950*C., DURING THE REACTION MAINTAINING IN SAID CHAMBER A FLUIDIZED SUSPENSION OF FINELY DIVIDED SOLID PARTICLES OF THE METAL UNDER PRODUCTION UPON THE SURFACES OF WHICH THE METAL BEING FORMED IN THE REACTION WILL DEPOSIT, EMPLOYING IN SAID REACTION A MOLE RATIO OF HYDROGEN TO METAL CHLORIDE OF BETWEEN 50/1 AND 225/1 WHEN NIOBIUM IS BEING PRODUCED, OF BETWEEN 100/1 AND 225/1 WHEN TANTALUM IS BEING PRODUCED,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |