US2892888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital system with error elimination
Assignee: AT&T Inc
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Filing: 1958-02-10
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Granted: 1959-06-30
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Expires: 1978-02-10
Abstract
No abstract record available.
Inventors
- 👤 Richard T James
- 👤 Alfred E Ruppel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:00
CPC Classifications
H; H04; H04L; H04L1/00; G; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-29 | 1962-12-29 | 1963-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-29 | 1966-12-29 | 1967-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-29 | 1970-12-29 | 1971-06-30 | $7700.00 | Window Closed / Lapsed |