US2931719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the production of metals by dissociation of their carbides
Assignee: Pechiney SA
•
Filing: 1957-09-06
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Granted: 1960-04-05
•
Expires: 1977-09-06
Abstract
No abstract record available.
Inventors
- 👤 Menegoz Charles Daniel
- 👤 Galy Andre Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:52
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0038; C22B21/0053; C22B26/00; C22B26/20; C22B4/00; C22B47/00; C22B5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN THE PROCESS OF PRODUCING METALS BY THE THERMAL DISSOCIATION OF THEIR CARBIDES IN A VACUUM INTO METALLIC VAPOR AND A CARBONACEOUS RESIDUE, AND WHEREIN THE CARBIDES ARE HEATED TO THE DISSOCIATION TEMPERATURE BY ELECTRICAL MEANS, THE IMPROVEMENT IN SAID PROCESS WHICH COMPRISES THE STEP OF: PASSING AN ELECTRIC CURRENT THROUGH A CHARGE CONSISTING OF METALLIC CARBIDES IN PARTICULATE FORM, WHEREBY THE CARBIDES ARE PROGRESSIVELY HEATED TO THEIR INITIAL DISSOCIATION TEMPERATURES BUT BELOW THE FUSION POINT OF THE RESULTANT RESIDUE, AND THE MAXIMUM TEMPERATURE ATTAINED OCCURS IN THE EXHAUSTED CARBONACEOUS RESIDUE SUBSTANTIALLY FREE OF CARBIDES AND METAL.
Claim 2
Dependent Claim
97 words
IN THE PROCESS OF PRODUCING METALS BY THE THERMAL DISSOCIATION OF THEIR CARBIDES IN A VACUUM INTO METALLIC VAPOR AND A CARBONACEOUS RESIDUE, AND WHEREIN THE CARBIDES ARE HEATED TO THE DISSOCIATION TEMPERATURE BY ELECTRICAL MEANS, THE IMPROVEMENT IN SAID PROCESS WHICH COMPRISES THE STEP OF: PASSING AN ELECTRIC CURRENT THROUGH A CHARGE CONSISTING OF METALLIC CARBIDES IN PARTICULATE FORM, WHEREBY THE CARBIDES ARE PROGRESSIVELY HEATED TO THEIR INITIAL DISSOCIATION TEMPERATURES BUT BELOW THE FUSION POINT OF THE RESULTANT RESIDUE, AND THE MAXIMUM TEMPERATURE ATTAINED OCCURS IN THE EXHAUSTED CARBONACEOUS RESIDUE SUBSTANTIALLY FREE OF CARBIDES AND METAL.
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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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |