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US2994074A
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Assignee: International Business Machines Corp
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Filing: 1957-12-30
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Granted: 1961-07-25
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Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert D Durand
- 👤 Robert G Driscoll
- 👤 Richard O Cobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:00
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/06; G; G06; G06K; G06K13/00; G06K13/18; G06K13/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142880A
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US2410521A
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US2418464A
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US2546819A
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US2547525A
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US2554549A
Cited
US2728905A
Cited
US2775753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |