US2974104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-energy magnetic material
Assignee: General Electric Co
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Filing: 1955-04-08
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Granted: 1961-03-07
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Expires: 1975-04-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas O Paine
- 👤 Lewis I Mendelsohn
- 👤 Fred E Luborsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:35
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/08; H01F1/083; C; C25; C25C; C25C5/00; C25C5/02; H01F1/061
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A MAGNETIC MATERIAL COMPRISING ELONGATED FINE PARTICLES SELECTED FROM THE CLASS CONSISTING OF (1) IRON AND (2) ALLOYS OF COBALT AND IRON IN ATOMIC RATIOS OF UP TO ABOUT 3 TO 1, AT LEAST HALF OF SAID PARTICLES HAVING ELONGATION RATIOS OF AT LEAST 2 TO 1, THE TRANSVERSE DIMENSION OF EACH OF SAID PARTICLES BEING THAT OF A SINGLE MAGNETIC DOMAIN, A PROTECTIVE MATERIAL COATING SAID PARTICLES AND A MATERIAL BINDING SAID COATED PARTICLES IN MAGNETICALLY ORIENTED FIXED SPACED RELATIONSHIP SUCH THAT THE MAJOR AXES OF SUBSTANTIALLY ALL OF SAID PARTICLES ARE SUBSTANTIALLY PARALLEL.
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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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |