Patent US2931719A successfully refreshed from Google Patents.
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
•
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 16:54
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.
References Cited (Backward Citations)
US996474A
Cited
US984503A
Cited
US1576883A
Cited
US2122419A
Cited
US2219059A
Cited
US2213170A
Cited
GB550732A
Cited
US2400000A
Cited
US2582120A
Cited
US2550684A
Cited
US2769705A
Cited
US2724644A
Cited
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 |