US3022375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronizing start-stop digital transmission system
Assignee: AT&T Inc
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Filing: 1955-09-22
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Granted: 1962-02-20
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Expires: 1975-09-22
Abstract
No abstract record available.
Inventors
- 👤 James R Davey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/04; H04L7/041; H04L7/046; H04L7/02; H04L7/027; H04L7/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |