US2859414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay network
Assignee: AT&T Inc
•
Filing: 1954-02-04
•
Granted: 1958-11-04
•
Expires: 1974-02-04
Abstract
No abstract record available.
Inventors
- 👤 Walter R Lundry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/18; H03H7/20; H03H11/00; H03H11/02; H03H11/16; H03H11/20; H03H11/22; H03H7/30; H03H7/32; H03H7/325; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/14; H04B3/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1759952A
Cited
US2241615A
Cited
US2298177A
Cited
GB594431A
Cited
US2641645A
Cited
US2716220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |