US2775727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: AT&T Inc
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Filing: 1954-12-08
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Granted: 1956-12-25
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Expires: 1974-12-08
Abstract
No abstract record available.
Inventors
- 👤 John J J Kernahan
- 👤 John C Lozier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:57
CPC Classifications
H; H03; H03M; H03M1/00; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/27; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34043; G05B2219/42; G05B2219/42237; H03M1/12; H03M1/22; Y; Y10; Y10S; Y10S177/00; Y10S177/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2537427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |