Patent US3391354A successfully refreshed from Google Patents.
US3391354A
Expired / Lapsed
US
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Modulator utilizing an insulated gate field effect transistor
Assignee: Hitachi Ltd
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Filing: 1964-12-17
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Granted: 1968-07-02
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Expires: 1984-12-17
Abstract
No abstract record available.
Inventors
- 👤 Ohashi Shinichi
- 👤 Nagata Minoru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:28
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/16; H03K17/161; H03K17/162; H03C; H03C1/00; H03C1/36; H03F; H03F3/00; H03F3/189; H03F3/19; H03F3/193; H03F3/38; H03F3/387; H03F3/393; H03K7/00; H03K7/02; H10; H10D; H10D99/00
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |