US2889453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable transistor radio frequency amplifier having approximately constant bandwidth
Assignee: General Electric Co
•
Filing: 1955-05-31
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Granted: 1959-06-02
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Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:22
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1664192A
Cited
GB454346A
Cited
US2267173A
Cited
US2596687A
Cited
US2511327A
Cited
US2647957A
Cited
US2641704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |