US4299622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic alloy
Assignee: Sony Corp
•
Filing: 1979-11-05
•
Granted: 1981-11-10
•
Expires: 1999-11-05
Abstract
Abstract A magnetic alloy which contains not less than 0.03 weight % but not more than 5.0 weight % of P not less than 3.0 weight % but not more than 26.0 weight % of Al and Si totally (where Al is not less than 0.01 weight % but not more than 13.0 weight % and Si is not less than 0.01 weight % but not more than 13.0 weight %), the remaining part of the alloy consists mainly of Fe and the alloy is characterized in that P is presented on the grain boundary thereof with the amount more than 0.5 weight % of the atoms which form said grain boundary.
Inventors
- 👤 Hiroshi Kimira
- 👤 Kenji Abiko
- 👤 Takashi Sato
- 👤 Isamu Yoshii
- 👤 Sadao Watanabe
- 👤 Yutaka Takei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:56
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/02; C22C38/06; G; G11; G11B; G11B5/00; G11B5/127; G11B5/147; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14791
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A magnetic alloy containing not less than 0.03 weight % but not more than 5.0 weight % of P, not less than 3.0 weight % but not more than 26.0 weight % of Al and Si totally (where Al is not less than 0.01 weight % but not more than 13.0 weight % and Si is not less than 0.01 weight % but not more 13.0 weight %), the remaining part consisting mainly of Fe, said alloy being characterized in that P is present on the grain boundaries thereof in an amount of more than 0.5 weight % of the atoms which form said grain boundaries.
Claim 2
Dependent Claim
106 words
A magnetic alloy containing not less than 0.03 weight % but not more than 5.0 weight % of P, not less than 3.0 weight % but not more than 26.0 weight % of Al and Si totally (where Al is not less than 0.01 weight % but not more than 13.0 weight % and Si is not less than 0.01 weight % but not more 13.0 weight %), the remaining part consisting mainly of Fe, said alloy being characterized in that P is present on the grain boundaries thereof in an amount of more than 0.5 weight % of the atoms which form said grain boundaries.
Claim 3
Dependent Claim
253 words
A magnetic alloy containing not less than 0.03 weight % but not more than 5.0 weight % of P and not less than 3.0 weight % but not more than 26.0 weight % of Al and Si totally (where Al is not less than 0.01 weight % but not more than 13.0 weight % and Si is not less than 0.01 weight % but not more than 13.0 weight %), and containing 0.01-10% by weight in total of at least one element selected from the group consisting of ______________________________________
Ti not more than 5.0 weight %
V "
Cr not more than 7.0 weight %
Mn not more than 5.0 weight %
Co "
Ni not more than 7.0 weight %
Cu not more than 6.0 weight %
Ge not more than 5.0 weight %
Y "
Zr "
Nb not more than 6.0 weight %
Mo not more than 5.0 weight %
Hf "
Ta "
W "
Rare earth not more than 3.0 weight %
elements
B not more than 0.5 weight %
Ca "
C not more than 0.8 weight %
N not more than 0.1 weight %
Sn not more than 3.0 weight %
Sb "
Pb not more than 0.5 weight %
Be not more than 3.0 weight %
______________________________________ the remaining part consisting mainly of Fe, said alloy being characterized in that P is present on the grain boundaries thereof in an amount of more than 0.5 weight % of the atoms which form said grain boundaries.
Claim 4
Dependent Claim
253 words
A magnetic alloy containing not less than 0.03 weight % but not more than 5.0 weight % of P and not less than 3.0 weight % but not more than 26.0 weight % of Al and Si totally (where Al is not less than 0.01 weight % but not more than 13.0 weight % and Si is not less than 0.01 weight % but not more than 13.0 weight %), and containing 0.01-10% by weight in total of at least one element selected from the group consisting of ______________________________________
Ti not more than 5.0 weight %
V "
Cr not more than 7.0 weight %
Mn not more than 5.0 weight %
Co "
Ni not more than 7.0 weight %
Cu not more than 6.0 weight %
Ge not more than 5.0 weight %
Y "
Zr "
Nb not more than 6.0 weight %
Mo not more than 5.0 weight %
Hf "
Ta "
W "
Rare earth not more than 3.0 weight %
elements
B not more than 0.5 weight %
Ca "
C not more than 0.8 weight %
N not more than 0.1 weight %
Sn not more than 3.0 weight %
Sb "
Pb not more than 0.5 weight %
Be not more than 3.0 weight %
______________________________________ the remaining part consisting mainly of Fe, said alloy being characterized in that P is present on the grain boundaries thereof in an amount of more than 0.5 weight % of the atoms which form said grain boundaries.
References Cited (Backward Citations)
US2899346A
Cited
US2193768A
Cited
US2186659A
Cited
US2843478A
Cited
US3392013A
Cited
US3698964A
Cited
US3971678A
Cited
US4065330A
Cited
US4168187A
Cited
US4131456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |