US2989628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized detector and audio amplifier system
Assignee: Avco Manufacturing Corp
•
Filing: 1957-01-23
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Granted: 1961-06-20
•
Expires: 1977-01-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Horgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:02
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26; H03D; H03D1/00; H03D1/08; H03D1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB398882A
Cited
US2647957A
Cited
US2750456A
Cited
US2760007A
Cited
GB756017A
Cited
US2816179A
Cited
US2889416A
Cited
US2822430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |