US2629024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unbalanced-to-ground two-to-fourwire connection
Assignee: AT&T Inc
•
Filing: 1950-12-29
•
Granted: 1953-02-17
•
Expires: 1970-12-29
Abstract
No abstract record available.
Inventors
- 👤 Paul G Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:47
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H04B1/58; H04B1/583; H03; H03H; H03H11/00; H03H11/02; H03H11/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB158536A
Cited
US1541668A
Cited
US1762768A
Cited
US2017180A
Cited
US2129990A
Cited
US2534624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |