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Patent US2591438A successfully refreshed from Google Patents.
US2591438A
Expired / Lapsed
US
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Portable radio receiver
Assignee: General Electric Co
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Filing: 1948-04-13
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Granted: 1952-04-01
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Expires: 1968-04-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Kinman
- 👤 Robert G Hibberd
- 👤 Hayward Cyril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:54
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/08; H04B1/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US827576A
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US1153029A
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US1993436A
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US1954392A
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US2159632A
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US2299058A
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US2388567A
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US2397306A
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US2502832A
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US2487509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |