US3398301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier phase selection type semiconductor device for oscillation and amplification o microwaves
Assignee: Hitachi Ltd
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Filing: 1965-03-08
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Granted: 1968-08-20
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Suzuki Yoshihisa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:01
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H03F3/55; H03B; H03B15/00; H03B9/00; H03B9/01; H03B9/10; H03B9/12; H03B9/14; H10; H10D; H10D99/00; H10N; H10N70/00; H10N70/10; H10N80/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |