US3372375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Error detection system
Assignee: International Business Machines Corp
•
Filing: 1964-05-05
•
Granted: 1968-03-05
•
Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Donald J Lem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:44
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14; H04L1/00; H04L1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2801338A
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US2872596A
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US2853633A
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US2957137A
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US2851638A
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US3078448A
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US3296525A
Cited
US3112412A
Cited
US3202834A
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US3179813A
Cited
US3098162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |