US2900344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making anisotropic permanent magnets
Assignee: US Philips Corp
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Filing: 1953-07-29
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Granted: 1959-08-18
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Expires: 1973-07-29
Abstract
No abstract record available.
Inventors
- 👤 Stuyts Andreas Leopoldus
- 👤 Hoekstra Age Hylke
- 👤 Weber Gerard Hugo
- 👤 Rathenau Gerhart Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2683
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD OF MANUFACTURING A PERMANENT MAGNET HAVING A (BH)MAX VALUE OF MORE THAN 29OX106 GAUSSOERSTED COMPRISING THE STEPS, ADDING TO A POWDERED MASS CONSISTING ESSENTIALLY OF HEXAGONAL CRYSTALS WITH A MAGNETOPLUMBITE STRUCTURE OF A COMPOUND MO6FE2O3, IN WHICH M IS A METAL SELECTED FROM THE GROUP CONSISTING OF BARIUM, STRONTIUM AND LEAD, AS A RECRYSTALLIUZATION INHIBITOR, ABOUT 0.01 TO 1% OF AN OXIDE SELECTED FRON THE GROUP BAO,CAO,LA2O3,BI2O3,B2O3,AS2O3 AND SB2O5 MAGNETICALLY ORIENTING SAID MASS, FORMING SAID MAGNETICALLY ORIENTED MASS INTO A BODY, AND HEATING SAID BODY TO A TEMPERATURE OF ABOUT 1150*C. TO 1350*C. TO FORM SAID PERMANENT MAGNET.
Claim 2
Independent Claim
100 words
A METHOD OF MANUFACTURING A PERMANENT MAGNET HAVING A (BH)MAX VALUE OF MORE THAN 29OX106 GAUSSOERSTED COMPRISING THE STEPS, ADDING TO A POWDERED MASS CONSISTING ESSENTIALLY OF HEXAGONAL CRYSTALS WITH A MAGNETOPLUMBITE STRUCTURE OF A COMPOUND MO6FE2O3, IN WHICH M IS A METAL SELECTED FROM THE GROUP CONSISTING OF BARIUM, STRONTIUM AND LEAD, AS A RECRYSTALLIUZATION INHIBITOR, ABOUT 0.01 TO 1% OF AN OXIDE SELECTED FRON THE GROUP BAO,CAO,LA2O3,BI2O3,B2O3,AS2O3 AND SB2O5 MAGNETICALLY ORIENTING SAID MASS, FORMING SAID MAGNETICALLY ORIENTED MASS INTO A BODY, AND HEATING SAID BODY TO A TEMPERATURE OF ABOUT 1150*C. TO 1350*C. TO FORM SAID PERMANENT MAGNET.
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |