Patent US2492351A successfully refreshed from Google Patents.
US2492351A
Expired / Lapsed
US
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Smoothing network
Assignee: AT&T Inc
•
Filing: 1944-02-23
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Granted: 1949-12-27
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Expires: 1964-02-23
Abstract
No abstract record available.
Inventors
- 👤 Hendrik W Bode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:17
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04; H03H11/12; F; F41; F41G; F41G3/00; F41G3/22; F41G3/24; G; G06; G06G; G06G7/00; G06G7/48; G06G7/78; G06G7/80; H03H7/00; H03H7/01; H03H7/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1935569A
Cited
US2070178A
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US2133687A
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US2378910A
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US2244369A
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US2222172A
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US2399726A
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US2377898A
Cited
US2435195A
Cited
US2352953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |