US3500142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field effect semiconductor apparatus with memory involving entrapment of charge carriers
Assignee: AT&T Inc
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Filing: 1967-06-05
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Granted: 1970-03-10
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Expires: 1987-06-05
Abstract
No abstract record available.
Inventors
- 👤 Dawon Kahng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
H; H10; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/28; H10F30/282; H10D; H10D30/00; H10D30/60; H10D30/68; H10D30/681; H10D30/683; H10D99/00; H10W; H10W74/00; H10W74/40; H10W74/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3365584A
Cited
US3348674A
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US3418493A
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US3296508A
Cited
US3267389A
Cited
US3423646A
Cited
US3397325A
Cited
US3384794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |