US3560200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnetic materials
Assignee: AT&T Inc
•
Filing: 1968-04-01
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Granted: 1971-02-02
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Expires: 1988-04-01
Abstract
Abstract THE SPECIFICATION DESCRIBES MAGNETIC COMPOSITIONS OF THE TERNARY SYSTEM CO-CU-RARE EARTH AND RELATED COMPOSITIONS WHEREIN THE COBALT MAY BE PARTIALLY OR COMPLETELY SUBSTITUTED WITH IRON, ALUMINUM OR NICKEL. CERTAIN OF THE INCLUDED COMPOSITIONS HAVE COERCIVITIES OF MANY THOUSANDS OF OERSTEDS.
Inventors
- 👤 Ethan A Nesbitt
- 👤 Jack H Wernick
- 👤 Ronald H Willens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; C; C22; C22C; C22C19/00; C22C28/00; C22C9/00; C22C9/06; H01F1/047; H01F1/053; H01F1/055; H01F1/0555; H01F1/0557
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |