Patent EP0144434A1 successfully refreshed from Google Patents.
US3500069A
Expired / Lapsed
US
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Pulse repetition frequency discriminator
Assignee: United States Department of the Navy
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Filing: 1966-10-12
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Granted: 1970-03-10
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Expires: 1986-10-12
Abstract
No abstract record available.
Inventors
- 👤 Robert R Johns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/284; H03K5/00; H03K5/13; H03K5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2931981A
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US3020483A
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US2976432A
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US3202834A
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US3223856A
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US3322967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |