US2572970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial line coupler
Assignee: AT&T Inc
•
Filing: 1944-08-31
•
Granted: 1951-10-30
•
Expires: 1964-08-31
Abstract
No abstract record available.
Inventors
- 👤 George H Baker
- 👤 Phillip H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:40
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/06; H01P1/062; H01P1/066; H01P1/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2231839A
Cited
US2342254A
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US2310695A
Cited
US2404279A
Cited
US2411299A
Cited
US2416981A
Cited
US2421591A
Cited
US2452202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |