US2813017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal process for producing alkali metals and magnesium
Assignee: Pechiney SA
•
Filing: 1955-08-26
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Granted: 1957-11-12
•
Expires: 1975-08-26
Abstract
No abstract record available.
Inventors
- 👤 Mathieu Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:29
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10; C22B26/20; C22B26/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE PROCESS OF MANUFACTURING METALS SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND MAGNESIUM, COMPRISING THE FOLLOWING STEPS: VAPORIZING A CHLORIDE OF A METAL SELECTED FROM THE SAID GROUP IN A RETORT; HEATING A ZONE CONTAINING SOLID CALCIUM CARBIDE; ZONE WHILE MAINTAINING IN SAID ZONE A PRESSURE SUBSTANTIALLY LESS THAN ATMOSPHERIC, WHEREBY THE CHLORIDE VAPORS ARE REDUCED AND METALLIC VAPORS ARE PRODUCED; CONDENSING THE LAST MENMETALLIC VAPORS ARE PRODUCED; CONDENSING THE LAST MEN-
Claim 2
Dependent Claim
74 words
THE PROCESS OF MANUFACTURING METALS SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND MAGNESIUM, COMPRISING THE FOLLOWING STEPS: VAPORIZING A CHLORIDE OF A METAL SELECTED FROM THE SAID GROUP IN A RETORT; HEATING A ZONE CONTAINING SOLID CALCIUM CARBIDE; ZONE WHILE MAINTAINING IN SAID ZONE A PRESSURE SUBSTANTIALLY LESS THAN ATMOSPHERIC, WHEREBY THE CHLORIDE VAPORS ARE REDUCED AND METALLIC VAPORS ARE PRODUCED; CONDENSING THE LAST MENMETALLIC VAPORS ARE PRODUCED; CONDENSING THE LAST MEN-
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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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |