US2379744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric circuit arrangement employing delay networks
Assignee: AT&T Inc
•
Filing: 1942-03-31
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Granted: 1945-07-03
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Expires: 1962-03-31
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Pfleger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:03
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/30; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/10; Y; Y10; Y10S; Y10S84/00; Y10S84/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-07-02 | 1949-01-01 | 1949-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-02 | 1953-01-01 | 1953-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-02 | 1957-01-01 | 1957-07-03 | $7700.00 | Window Closed / Lapsed |