Patent US2738169A successfully refreshed from Google Patents.
Patent US3491026A successfully refreshed from Google Patents.
US3491026A
Expired / Lapsed
US
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Ferromagnetic-semiconductor composition
Assignee: RCA Corp
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Filing: 1967-06-06
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Granted: 1970-01-20
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Expires: 1987-06-06
Abstract
No abstract record available.
Inventors
- 👤 Hans W Lehmann
- 👤 Morray Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:36
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/40; C; C22; C22C; C22C28/00; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |