Patent US2870315A successfully refreshed from Google Patents.
US2870315A
Expired / Lapsed
US
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Apparatus for forming cathodes
Assignee: TDK Micronas GmbH
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Filing: 1954-01-18
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Granted: 1959-01-20
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Expires: 1974-01-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:37
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0017; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J9/00; H01J9/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1904895A
Cited
US2102760A
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US2161458A
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US2146427A
Cited
US2208129A
Cited
US2264496A
Cited
US2413442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |