US4010434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radially anisotropic magnet body
Assignee: US Philips Corp
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Filing: 1976-01-14
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Granted: 1977-03-01
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Expires: 1996-01-14
Abstract
Abstract A sintered, radially anisotropic, permanent magnetizable body consisting of a ferrite of the formula Me0.6 Fe 2 O 3 , wherein Me is at least one of the metals barium, strontium and lead. The body has a closed annular shape with an inside diameter which is at least 0.8 times the outside diameter.
Inventors
- 👤 Franciscus Xaverius Nicolaus Maria Kools
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:57
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/021; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2683
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A curved, sintered, radially anisotropic, permanently magnetisable body essentially consisting of a ferrite of the formula MeO.6Fe 2 O 3 , wherein Me is at least one of the metals barium, strontium and lead, said body having a closed annular shape with an inside diameter which is at least 0.8 times the outside diameter.
Claim 2
Dependent Claim
54 words
A curved, sintered, radially anisotropic, permanently magnetisable body essentially consisting of a ferrite of the formula MeO.6Fe 2 O 3 , wherein Me is at least one of the metals barium, strontium and lead, said body having a closed annular shape with an inside diameter which is at least 0.8 times the outside diameter.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |