Patent US2862287A successfully refreshed from Google Patents.
US2862287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cast alnico magnets
Assignee: US Philips Corp
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Filing: 1953-12-11
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Granted: 1958-12-02
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Expires: 1973-12-11
Abstract
No abstract record available.
Inventors
- 👤 Koch Adolf Johannes Jacobus
- 👤 Lips Eduard Maria Henricus
- 👤 Vos Krijn Jacobus De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:02
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; Y; Y10; Y10S; Y10S148/00; Y10S148/074; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49789; Y10T29/4979
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD OF MANUFACTURING A MAGNETICALLY ANISOTROPIC PERMANENT MAGNET CONSISTING OF AN IRON-BASE ALLOY CONTAINING NICKEL, COBALT AND ALUMINUM COMPRISING THE STEPS, INTRODUCING SAID ALLOY WHILE MOLTEN INTO A MOLD TO FORM A CASTING, PLACING CHILL PLATES IN THERMAL CONTACT WITH OPPOSITE ENDS OF SAID CASTING TO WITHDRAW HEAT LONGITUDINALLY AND TO PROMOTE COLUMNAR CRYSTAL GROWTH IN THE (100)-DIRECTION, RETARDING TRANSVERSE HEAT-LOSS FROM A PORTION OF THE CASTING INTERMEDIATE THE ENDS WHILE THE ENDS THEREOF ARE BEING COOLED TO FORM A SEPARATION PLANE COINCIDENT WITH THE PLANE OF MINIMUM HEAT-LOSS, AND DIVIDING THE CASTING ALONG THE SEPARATION PLANE AFTER COOLING.
Claim 2
Independent Claim
100 words
A METHOD OF MANUFACTURING A MAGNETICALLY ANISOTROPIC PERMANENT MAGNET CONSISTING OF AN IRON-BASE ALLOY CONTAINING NICKEL, COBALT AND ALUMINUM COMPRISING THE STEPS, INTRODUCING SAID ALLOY WHILE MOLTEN INTO A MOLD TO FORM A CASTING, PLACING CHILL PLATES IN THERMAL CONTACT WITH OPPOSITE ENDS OF SAID CASTING TO WITHDRAW HEAT LONGITUDINALLY AND TO PROMOTE COLUMNAR CRYSTAL GROWTH IN THE (100)-DIRECTION, RETARDING TRANSVERSE HEAT-LOSS FROM A PORTION OF THE CASTING INTERMEDIATE THE ENDS WHILE THE ENDS THEREOF ARE BEING COOLED TO FORM A SEPARATION PLANE COINCIDENT WITH THE PLANE OF MINIMUM HEAT-LOSS, AND DIVIDING THE CASTING ALONG THE SEPARATION PLANE AFTER COOLING.
References Cited (Backward Citations)
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US642608A
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US652022A
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US661727A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |