US3403383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated analog-digital switching system with modular message store-and-forward facilities
Assignee: AT&T Inc
•
Filing: 1964-05-28
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Granted: 1968-09-24
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Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Harry G Kienzle
- 👤 Roger E Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:48
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/20; G06F13/22; G06F3/00; G06F3/16; H; H04; H04L; H04L12/00; H04L12/54; H04M; H04M3/00; H04M3/42; H04M3/50; H04M3/53; H04M3/533; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2955165A
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US3223976A
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US3302182A
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US3334191A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |