Patent US3837844A successfully refreshed from Google Patents.
US3837844A
Expired / Lapsed
US
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Wear resisting magnetic material having high permeability
Assignee: Hitachi Ltd
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Filing: 1971-08-06
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Granted: 1974-09-24
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Expires: 1991-08-06
Abstract
Abstract A wear resisting magnetic material having high permeability in which not more than 10 percent by weight of at least one additive element selected from the group consisting of V and Ti is added to the conventional Fe-Ni series permalloy such as Fe-Ni, Fe-NiMo, Fe-Ni-Cr and so on in order to enhance it''s wear resisting property without impairing workability.
Inventors
- 👤 M Makita
- 👤 Y Kitagawa
- 👤 W Hayakawa
- 👤 M Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:45
CPC Classifications
C; C22; C22C; C22C19/00; C22C38/00; C22C38/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
The magnetic material of claim 1, wherein the amount of Mn therein is sufficient to improve the workability of the material.
Claim 2
Dependent Claim
17 words
The magnetic material of claim 1, wherein the amount of Mn is about 0.5 percent by weight.
Claim 3
Dependent Claim
33 words
The magnitude material of claim 1, consisting by weight of 35 to 90 % Ni, 0.2 to 6 percent by weight Ti, 1 to 10 percent by weight V, and the balance Fe.
References Cited (Backward Citations)
US1715541A
Cited
US2105658A
Cited
US2990277A
Cited
US3117862A
Cited
US3269834A
Cited
US3348983A
Cited
US3615910A
Cited
US3673116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |