Patent US4444937A successfully refreshed from Google Patents.
Patent US3427445A successfully refreshed from Google Patents.
US3427445A
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Full adder using field effect transistor of the insulated gate type
Assignee: International Business Machines Corp
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Filing: 1965-12-27
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Granted: 1969-02-11
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Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Jack R Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:24
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F7/501; G06F7/502; H; H03; H03K; H03K19/00; H03K19/20; H03K19/21; H03K19/212; H03K19/215; H10; H10B; H10B20/00; H10D; H10D84/00; H10D84/80; H10D84/82; H10D84/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3215861A
Cited
US3201574A
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US3250917A
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US3299291A
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US3252011A
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US3267295A
Cited
US3305708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |