Patent US2551420A successfully refreshed from Google Patents.
US2551420A
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Gastight electrode seal
Assignee: Siemens SpA
•
Filing: 1949-04-14
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Granted: 1951-05-01
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Expires: 1969-04-14
Abstract
No abstract record available.
Inventors
- 👤 Conti Giampietro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:01
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/10; H05B7/103; H05B7/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US846521A
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GB130205A
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DE407827C
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US1496231A
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DE379612C
Cited
US1508486A
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US1715376A
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FR636946A
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US1858455A
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US2154737A
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US2226747A
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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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |