US3429029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor device
Assignee: International Business Machines Corp
•
Filing: 1963-06-28
•
Granted: 1969-02-25
•
Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 Jack L Langdon
- 👤 Raymond P Pecoraro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
H; H10; H10W; H10W42/00; H10P; H10P95/00; H10W20/00; H10W20/40; H10W72/00; H10W72/01; H10W72/012; H10W72/019; H10W72/20; H10W74/00; H10W74/40; H10W74/43; H10W72/90; H10W72/921; H10W72/923; H10W72/941; H10W72/944; H10W72/9445; H10W72/951; H10W72/952
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2680220A
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US2817046A
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US2817048A
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US2801375A
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US3119171A
Cited
US2989669A
Cited
US2972092A
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US3247428A
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US3114195A
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US3200019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |