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US2961618A
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Assignee: AT&T Inc
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Filing: 1957-06-12
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Granted: 1960-11-22
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Expires: 1977-06-12
Abstract
No abstract record available.
Inventors
- 👤 Edward A Ohm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:08
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/161
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735985A
Cited
US2425345A
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US2542185A
Cited
US2684469A
Cited
US2764743A
Cited
GB671206A
Cited
US2682610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |