US2860965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing pure manganese
Assignee: Pechiney SA
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Filing: 1957-06-07
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Granted: 1958-11-18
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Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Ruelle Louis
- 👤 Tardieu Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:45
CPC Classifications
C; C22; C22B; C22B47/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
THE PROCESS OF PRODUCING PURE MANGANESE FROM A CARBON-CONTAINING MANGANESE ALLOY, WHICH COMPRISES THE STEPS: HEATING PARTICLES OF SAID ALLOY IN A VACUUM TO A TEMPERATURE BELOW THE MELTING POINT OF SAID ALLOY BUT SUFFICIENT TO EVAPORATE MANGANESE THEREFROM, WHEREBY A POROUS GRAPHITE LAYER IS FORMED ON EACH INDIVIDUAL PARTICLE; CONDENSING AND COLLECTING THE MANGANESE SO EVAPORATED; THEREAFTER RAISING THE PARTICLES TO A HIGHER TEMPERATURE, MAINTAINING THE PARTICLES AT SAID HIGHER TEMPERATURE WHEREBY ADDITIONAL QUANTITIES OF MANGANESE ARE EVAPORATED, AND CONDENSING AND COLLECTING SUCH ADDITIONAL EVAPORATED MANGANESE.
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) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |