US3341940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a permanent magnet
Assignee: US Philips Corp
•
Filing: 1963-03-28
•
Granted: 1967-09-19
•
Expires: 1983-03-28
Abstract
No abstract record available.
Inventors
- 👤 Tomholt Frits
- 👤 Witteveen Willem Eise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:02
CPC Classifications
B; B03; B03C; B03C1/00; H; H01; H01F; H01F41/00; H01F41/02; H01F41/0253; H01F41/0273; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF MANUFACTURING A MAGNETICALLY ANISOTROPIC BODY COMPRISING THE STEPS, DISINTEGRATING A FINELYDIVIDED MAGNETIC MATERIAL IN A CLOSED RECEPTACLE, WHIRLING SAID MATERIAL IN SAID RECEPTACLE TO FORM A DUST CLOUD OF SAID MATERIAL, SEPARATING PARTICLES OF SAID MATERIAL IN SAID DUST CLOUD WITH A MAGNETIC FIELD WHICH FORMS MAGNETICALLY ANISOTROPIC CONGLOMERATES OF SAID PARTICLES, REMOVING SAID CONGLOMERATES FROM SAID RECEPTACLE, COMPRESSING THE MAGNETICALLY ANISOTROPIC CONGLOMERATES OF SAID PARTICLES IN THE PRESENCE OF A MAGNETIC FIELD INT A BODY, AND SINTERING SAID BODY TO FORM THE SAME INTO A HIGHLY COHERENT BODY.
Claim 2
Independent Claim
92 words
A METHOD OF MANUFACTURING A MAGNETICALLY ANISOTROPIC BODY COMPRISING THE STEPS, DISINTEGRATING A FINELYDIVIDED MAGNETIC MATERIAL IN A CLOSED RECEPTACLE, WHIRLING SAID MATERIAL IN SAID RECEPTACLE TO FORM A DUST CLOUD OF SAID MATERIAL, SEPARATING PARTICLES OF SAID MATERIAL IN SAID DUST CLOUD WITH A MAGNETIC FIELD WHICH FORMS MAGNETICALLY ANISOTROPIC CONGLOMERATES OF SAID PARTICLES, REMOVING SAID CONGLOMERATES FROM SAID RECEPTACLE, COMPRESSING THE MAGNETICALLY ANISOTROPIC CONGLOMERATES OF SAID PARTICLES IN THE PRESENCE OF A MAGNETIC FIELD INT A BODY, AND SINTERING SAID BODY TO FORM THE SAME INTO A HIGHLY COHERENT BODY.
References Cited (Backward Citations)
US2186659A
Cited
US2384215A
Cited
US2856273A
Cited
US3090107A
Cited
US2974887A
Cited
US3033474A
Cited
US3189667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |