US3291739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic materials and methods of fabrication
Assignee: TDK Micronas GmbH
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Filing: 1963-02-20
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Granted: 1966-12-13
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Expires: 1983-02-20
Abstract
No abstract record available.
Inventors
- 👤 Deschamps Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:02
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2616; C04B35/2625; C04B35/2633
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
IN THE METHOD FOR MAKING FERROMAGNETIC MATERIALS OF THE FERRITE TYPE FOR USE AT HYPER-FREQUENCIES AND HAVING A MOLECULAR COMPOSITION, AFTER ANNEALING OF:
Claim 2
Dependent Claim
23 words
IN THE METHOD FOR MAKING FERROMAGNETIC MATERIALS OF THE FERRITE TYPE FOR USE AT HYPER-FREQUENCIES AND HAVING A MOLECULAR COMPOSITION, AFTER ANNEALING OF:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |