Patent US3531777A successfully refreshed from Google Patents.
US3531777A
Expired / Lapsed
US
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Synchronising arrangements in digital communications systems
Assignee: TECHNOLOGY UK
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Filing: 1968-10-03
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Granted: 1970-09-29
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Expires: 1988-10-03
Abstract
No abstract record available.
Inventors
- 👤 Norman West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
H; H04; H04L; H04L7/00; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/062; H04J3/0626; H04J3/0635; H04J3/0676
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3209332A
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US3250897A
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US3229259A
Cited
US3266024A
Cited
US3188569A
Cited
US3366737A
Cited
US3350689A
Cited
US3289014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |