US3003122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low level transistor switching circuit
Assignee: North American Aviation Corp
•
Filing: 1958-03-21
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Granted: 1961-10-03
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Expires: 1978-03-21
Abstract
No abstract record available.
Inventors
- 👤 Francis H Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:29
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/24; H03C; H03C1/00; H03C1/36; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2670445A
Cited
US2802071A
Cited
US2802118A
Cited
US2863123A
Cited
US2820199A
Cited
US2809303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |