US3458661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for providing partial service on a failed serially looped carrier system
Assignee: AT&T Inc
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Filing: 1966-06-21
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Granted: 1969-07-29
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Expires: 1986-06-21
Abstract
No abstract record available.
Inventors
- 👤 John P Forde
- 👤 Lester Hochgraf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/74; H04B1/745; H04J; H04J3/00; H04J3/02; H04J3/08; H04J3/085; H04J3/14; H04L; H04L12/00; H04L12/28; H04L12/42; H04L12/437; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |