US3392338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency amplifier
Assignee: AT&T Inc
•
Filing: 1964-12-31
•
Granted: 1968-07-09
•
Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Uenohara Michiyuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:29
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/085; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3237017A
Cited
US3195062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |