Patent US3427152A successfully refreshed from Google Patents.
US3427152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of magnesium by thermal treatment of magnesium oxide utilizing countercurrently flowing hot inert gas
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1965-12-09
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Granted: 1969-02-11
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Expires: 1985-12-09
Abstract
No abstract record available.
Inventors
- 👤 Benjamin Eisenberg
- 👤 Ellington M Magee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:00
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/20; C22B26/22; C22B5/00; C22B5/02; C22B5/04; C22B5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3264097A
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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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |