US3372376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Error control apparatus
Assignee: AT&T Inc
•
Filing: 1964-10-05
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Granted: 1968-03-05
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Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 Harry A Helm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:12
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0057; H03; H03M; H03M13/00; H03M13/03; H03M13/05; H03M13/09; H03M13/65; H03M13/6508; H03M13/6516
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3155818A
Cited
US3267460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |