US2497268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnets and method for the obtention of the same
Assignee: Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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Filing: 1945-03-28
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Granted: 1950-02-14
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Expires: 1965-03-28
Abstract
No abstract record available.
Inventors
- 👤 Neel Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:34
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0235; B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/20; B22F9/22; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
A PERMANENT MAGNET CONSISTING ESSENTIALLY OF AN AGGLOMERATEDE BUT UNSINTERED BODY OF PURE IRON POWER AND ABOUT 0.1% TO 10% BY WEIGHT OF A POWDERED METAL OXIDE HAVING A HIGH FORMATION HEAT SELECTED FROM THE GROUP CONSISTING OF CALCIUM, MAGNESIUM, ALUMINUM AND CADMIUM.
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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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |