Patent US3102807A successfully refreshed from Google Patents.
US3102807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing crude metal
Assignee: Dow Chemical Co
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Filing: 1958-02-03
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Granted: 1963-09-03
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Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Douglas S Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:19
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; C22B5/06; Y; Y10; Y10S; Y10S266/00; Y10S266/905
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
THE METHOD OF PRODUCING A CRUDE METAL HAVING A TETRAHALIDE REDUCIBLE BY MOLTEN MAGNESIUM METAL WHICH COMPRISES: SUSPENDING SOLID PIECES OF MAGNEISUM METAL WITHIN A CONFINING MEANS BELOW THE LEVEL OF A MOLTEN SALT BATH HAVING A GREATER DENSITY THAN THE MOLTEN MAGNESIUM METAL AND BEING MAINTANED AT A TEMPERATURE ABOVE THE MELTING POINT OF MAGNESIUM METAL, THEREBY CREATING A REACTION ZONE WHICH IS CLOSED TO COMMUNICATION UPWARDLY AND OPEN TO COMMUNICATION DOWNWARDLY SO THAT THE MAGNESIUM METAL DISPLACED MOLTEN SALT FROM SAID REACTION ZONE AND FORMS, WHEN MELTED, A CONTACTING SURFACE WITH SAID MOLTEN SALT THEREBELOW; CONFINING THE MOLTEN MAGNESIUM METAL IN SAID REACTION ZONE SUSPENDED IN SAID MOLTEN SALT BATH; CONTINUOUSLY ADMITTING A TETRAHALIDE OF THE METAL TO
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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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |