US2495511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twin-t network and selective amplifier filter
Assignee: Lanteris Space LLC
•
Filing: 1944-10-31
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Granted: 1950-01-24
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Expires: 1964-10-31
Abstract
No abstract record available.
Inventors
- 👤 Charles E Dolberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:09
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/189; H03H; H03H11/00; H03H11/02; H03H11/04; H03H11/12; H03H11/1295; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1638
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2167079A
Cited
US2173426A
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US2229703A
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US2245365A
Cited
US2323609A
Cited
US2370483A
Cited
US2383984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |