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US3306737A
Expired / Lapsed
US
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Magnesium and rare earth metal containing prealloy for the treatment of iron and steel melts
Assignee: GEA Group AG
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Filing: 1963-09-04
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Granted: 1967-02-28
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Expires: 1983-09-04
Abstract
No abstract record available.
Inventors
- 👤 Muhlberger Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:26
CPC Classifications
C; C22; C22C; C22C35/00; C21; C21C; C21C1/00; C21C1/02; C21C1/10; C21C1/105; C21C7/00; C21C7/04; C21C7/06; C22C19/00; C22C19/007; C22C28/00
Claims Analysis
Total Claims: 0
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |