Patent US1467486A successfully refreshed from Google Patents.
Patent US2553735A successfully refreshed from Google Patents.
US2553735A
Expired / Lapsed
US
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Push-pull output tube
Assignee: Zenith Electronics LLC
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Filing: 1950-01-21
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Granted: 1951-05-22
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Expires: 1970-01-21
Abstract
No abstract record available.
Inventors
- 👤 Adler Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:37
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/10; H01J21/14; H01J2893/00; H01J2893/0029
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB458169A
Cited
US2176599A
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US2159818A
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US2165308A
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US2194547A
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US2265311A
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US2202376A
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US2257795A
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US2305617A
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US2390250A
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US2393803A
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US2427888A
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US2505261A
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US2511143A
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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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |