US2442762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of improving the magnetic quality of anisotropic permanent magnets containing iron, nickel, cobalt, and aluminum
Assignee: AT&T Inc
•
Filing: 1943-09-09
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Granted: 1948-06-08
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Expires: 1963-09-09
Abstract
No abstract record available.
Inventors
- 👤 William C Ellis
- 👤 Ferguson Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:33
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1358810A
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US1542233A
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US2048166A
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US1955141A
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US1978221A
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US2002689A
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GB522731A
Cited
US2293240A
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US2207685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |