US3487362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission error detection and correction system
Assignee: International Business Machines Corp
•
Filing: 1967-04-10
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Granted: 1969-12-30
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Expires: 1987-04-10
Abstract
No abstract record available.
Inventors
- 👤 Alexander H Frey Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:05
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0057; H03; H03M; H03M13/00; H03M13/03; H03M13/05; H03M13/13; H03M13/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3291972A
Cited
US3278729A
Cited
US3340507A
Cited
US3336467A
Cited
US3373404A
Cited
US3402390A
Cited
US3411135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |