Patent US4169877A successfully refreshed from Google Patents.
US3518643A
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Magnetic domain propagation arrangement
Assignee: AT&T Inc
•
Filing: 1968-05-03
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Granted: 1970-06-30
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Expires: 1988-05-03
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Perneski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:22
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883; G11C11/00; G11C11/02; G11C11/16; G11C11/165; G11C11/1675; G11C11/1693; G11C19/0808; G11C19/0816; G11C19/0841; G11C19/085; G11C19/0858
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3438006A
Cited
US3438016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |