Patent US3490690A successfully refreshed from Google Patents.
US3490690A
Expired / Lapsed
US
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Data reduction system
Assignee: International Business Machines Corp
•
Filing: 1964-10-26
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Granted: 1970-01-20
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Expires: 1984-10-26
Abstract
No abstract record available.
Inventors
- 👤 Clarence T Apple
- 👤 Luke F Little
- 👤 James T Dervan
- 👤 Clinton V Davis Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:13
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/02; G06F3/00; H; H03; H03M; H03M7/00; H03M7/30; H04; H04N; H04N1/00; H04N1/41; H04N1/411; H04N1/413; H04N1/417
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3177352A
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US3354466A
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US3233236A
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US3185823A
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US3185824A
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US3213268A
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US3237170A
Cited
US3311893A
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US3278907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |