US3549911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable threshold level field effect memory device
Assignee: RCA Corp
•
Filing: 1968-12-05
•
Granted: 1970-12-22
•
Expires: 1988-12-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Scott Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:26
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/60; H10D30/69; G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/403; G11C16/00; G11C16/02; G11C16/04; G11C16/0466
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |