US2889458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Narrow band discriminator circuit
Assignee: TDK Micronas GmbH
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Filing: 1954-11-12
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Granted: 1959-06-02
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Expires: 1974-11-12
Abstract
No abstract record available.
Inventors
- 👤 Richard F Baum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:25
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/16; H03K; H03K9/00; H04; H04J; H04J1/00; H04J1/02; H04J1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2045991A
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US2204702A
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US2244022A
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US2204574A
Cited
US2425922A
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US2771552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |