Patent US3016296A successfully refreshed from Google Patents.
US3016296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reduction of refractory metal oxide to metal by calcium carbide
Assignee: Individual
•
Filing: 1959-09-23
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Granted: 1962-01-09
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Expires: 1979-09-23
Abstract
No abstract record available.
Inventors
- 👤 Morton M Wong
- 👤 Ernst K Kleespies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:09
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; C22B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE METHOD FOR THE PREPARATION OF REFRACTORY METALS BY REDUCTION OF AN OXIDE OF SAID REFRACTORY METAL WITH CALCIUM CARBIDE IN THE PRESENCE OF A FLUX MATERIAL AT A TEMPERATURE AT WHICH THE FLUX MATERIAL IS MOLTEN, THE IMPROVEMENT WHICH COMPRISES DISPOSING SAID CARBIDE AND FLUX AND A REACTANT COMPRISING REFRACTORY METAL OXIDE IN GENERALLY VERTICAL LAYERS WITHIN A CRUCIBLE, THE INDIVIDUAL LAYERS OF THE SAID OCIDE REACTANT AND CARBIDE BEING SEPARATED BY EACH BEING IN INTIMATE CONTACT WITH AT LEAST A DIFFERENBT ONE OF THE WALLS OF FLUX, WHICH DEFINE THE DISTINCT GENERALLY VERTICALLY DISPOSED OUTER SURFACES OF THE LAYER OF FLUX.
Claim 2
Dependent Claim
104 words
IN THE METHOD FOR THE PREPARATION OF REFRACTORY METALS BY REDUCTION OF AN OXIDE OF SAID REFRACTORY METAL WITH CALCIUM CARBIDE IN THE PRESENCE OF A FLUX MATERIAL AT A TEMPERATURE AT WHICH THE FLUX MATERIAL IS MOLTEN, THE IMPROVEMENT WHICH COMPRISES DISPOSING SAID CARBIDE AND FLUX AND A REACTANT COMPRISING REFRACTORY METAL OXIDE IN GENERALLY VERTICAL LAYERS WITHIN A CRUCIBLE, THE INDIVIDUAL LAYERS OF THE SAID OCIDE REACTANT AND CARBIDE BEING SEPARATED BY EACH BEING IN INTIMATE CONTACT WITH AT LEAST A DIFFERENBT ONE OF THE WALLS OF FLUX, WHICH DEFINE THE DISTINCT GENERALLY VERTICALLY DISPOSED OUTER SURFACES OF THE LAYER OF FLUX.
References Cited (Backward Citations)
GB771139A
Cited
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 |