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Patent US3326543A successfully refreshed from Google Patents.
US3326543A
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Lining for installations for the degasification of metals
Assignee: Didier Werke AG
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Filing: 1964-10-02
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Granted: 1967-06-20
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Expires: 1984-10-02
Abstract
No abstract record available.
Inventors
- 👤 Kienow Sigismund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:08
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2572688A
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US2579781A
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US2733913A
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US3067050A
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US2043029A
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US2823134A
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US3030228A
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US3153110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |