Patent US3436343A successfully refreshed from Google Patents.
US3453448A
Expired / Lapsed
US
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Threshold detector employing a shunt connected tunnel diode
Assignee: Unisys Corp
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Filing: 1965-08-25
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Granted: 1969-07-01
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Expires: 1985-08-25
Abstract
No abstract record available.
Inventors
- 👤 Keith E Close
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:27
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K17/00; H03K17/51; H03K17/56; H03K17/58; H03K3/00; H03K3/02; H03K3/313; H03K3/315
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |