US3521255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nondestructive memory with hall voltage readout
Assignee: Nortel Networks Ltd
•
Filing: 1967-07-25
•
Granted: 1970-07-21
•
Expires: 1987-07-25
Abstract
No abstract record available.
Inventors
- 👤 Horst Arndt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:13
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06085
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3123748A
Cited
US2553490A
Cited
US2545369A
Cited
US3189815A
Cited
US3150356A
Cited
US3131381A
Cited
US3343084A
Cited
US3337856A
Cited
US3439349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |