US3228000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangements for detecting signal transmission errors in telegraph and like systems
Assignee: Associated Electrical Industries Ltd
•
Filing: 1962-10-29
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Granted: 1966-01-04
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 Collis Reginald Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:58
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121163A
Cited
US2740106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |