Patent US3344072A successfully refreshed from Google Patents.
US3344072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tantalum doped nickel-zinc ferrite
Assignee: NEC Corp
•
Filing: 1964-02-25
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Granted: 1967-09-26
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Expires: 1984-02-25
Abstract
No abstract record available.
Inventors
- 👤 Akashi Tsuneo
- 👤 Takamizawa Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A NICKEL-ZINC FERRITE COMPRISING A SINTERED MIXTURE OF FROM 46 TO 54 MOL PERCENT FERRIC OXIDE, FROM 19 TO 35 MOL PERCENT NICKEL OXIDE, FROM 11 TO 35 MOL PERCENT ZINC OXIDE, AND FROM 0.01 TO 4.6 MOL PERCENT TANTALUM PENTOXIDE.
Claim 2
Dependent Claim
41 words
A NICKEL-ZINC FERRITE COMPRISING A SINTERED MIXTURE OF FROM 46 TO 54 MOL PERCENT FERRIC OXIDE, FROM 19 TO 35 MOL PERCENT NICKEL OXIDE, FROM 11 TO 35 MOL PERCENT ZINC OXIDE, AND FROM 0.01 TO 4.6 MOL PERCENT TANTALUM PENTOXIDE.
References Cited (Backward Citations)
CA632174A
Cited
US2744873A
Cited
US2995517A
Cited
US3062667A
Cited
US3062668A
Cited
US3208948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |