US3394224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital information multiplexing system with synchronizing means
Assignee: AT&T Inc
•
Filing: 1965-08-02
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Granted: 1968-07-23
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Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 Harry A Helm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/04; H04L7/041; H04L7/043; H04J; H04J13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3358082A
Cited
US3358083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |