Patent US5188605A successfully refreshed from Google Patents.
US3515805A
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US
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Assignee: AT&T Inc
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Filing: 1967-02-06
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Granted: 1970-06-02
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Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Renato D Fracassi
- 👤 John E Savage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:37
CPC Classifications
H; H04; H04L; H04L9/00; H04L9/06; H04L9/0618; H04L9/0637; H04L25/00; H04L25/02; H04L25/03; H04L25/03828; H04L25/03866; H04L9/065; H04L9/0656; G; G11; G11B; G11B20/00; G11B20/00086; G11B20/0021; H04L2209/00; H04L2209/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3155818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |