US3219496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing columnar crystal texture in sintered permanent magnets
Assignee: Magnetfabrik Bonn GmbH
•
Filing: 1963-02-12
•
Granted: 1965-11-23
•
Expires: 1983-02-12
Abstract
No abstract record available.
Inventors
- 👤 Erich A Steingrover
- 👤 Gunther F A Heimke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:39
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/08; H01F1/086; B; B22; B22F; B22F3/00; C; C30; C30B; C30B1/00; C30B1/02; C30B1/06; C30B1/08; C30B29/00; C30B29/10; C30B29/52; C30B31/00; C30B31/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD FOR PRODUCING A COLUMNAR CRYSTAL TEXTURE IN SINTERED PERMANENT MAGNETS OF THE ALNICO TYPE COMPRISING HEATING A SINTERED ALNICO BODY TO A TEMPERATURE CLOSE TO THE MELTING POINT, PASSING THE BODY THROUGH A ZONE WHERE ITS TEMPERATURE IS LOWERED BY ABOUT 100*C., THEREBY PRODUCING SECONDARY RECRYSTALLIZATION, AND ESTABLISHING IN SAID BODY IN THE DIRECTION OF ITS PASSAGE THROUGH SAID ZONE TO A TEMPERATURE GRADIENT OF 10 TO 100*C./CM. SO AS TO PRODUCE ORIENTED CRYSTAL GROWTH SAID DIRECTION.
Claim 2
Independent Claim
79 words
A METHOD FOR PRODUCING A COLUMNAR CRYSTAL TEXTURE IN SINTERED PERMANENT MAGNETS OF THE ALNICO TYPE COMPRISING HEATING A SINTERED ALNICO BODY TO A TEMPERATURE CLOSE TO THE MELTING POINT, PASSING THE BODY THROUGH A ZONE WHERE ITS TEMPERATURE IS LOWERED BY ABOUT 100*C., THEREBY PRODUCING SECONDARY RECRYSTALLIZATION, AND ESTABLISHING IN SAID BODY IN THE DIRECTION OF ITS PASSAGE THROUGH SAID ZONE TO A TEMPERATURE GRADIENT OF 10 TO 100*C./CM. SO AS TO PRODUCE ORIENTED CRYSTAL GROWTH SAID DIRECTION.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |