US3487389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-clocking data recording transmission system
Assignee: Plessey Overseas Ltd
•
Filing: 1966-10-14
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Granted: 1969-12-30
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Expires: 1986-10-14
Abstract
No abstract record available.
Inventors
- 👤 David Thomas Gwillim
- 👤 Arye Leib Freedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:05
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/08; G; G11; G11B; G11B20/00; G11B20/10; G11B20/14; G11B20/1403; G11B20/1407; G11B20/1419; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3377583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |