US2938982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay for switching connections between three conductors meeting at a common point
Assignee: AT&T Inc
•
Filing: 1958-12-31
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Granted: 1960-05-31
•
Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 John T L Brown
- 👤 Walter G Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:25
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2539259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |