Patent US3421148A successfully refreshed from Google Patents.
US3421148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data processing equipment
Assignee: International Standard Electric Corp
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Filing: 1965-11-16
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Granted: 1969-01-07
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Expires: 1985-11-16
Abstract
No abstract record available.
Inventors
- 👤 George Aneurin Howells
- 👤 Geoffrey Allen Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:53
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0751; G06F11/0754; G06F11/08; G06F11/10; G06F11/14; G06F11/16; G06F11/1608; G06F11/20; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C8/00; H; H03; H03M; H03M13/00; H03M13/03; H03M13/05; H03M13/13; H03M13/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |