Patent US2950251A successfully refreshed from Google Patents.
US2950251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic materials having rectangular hysteresis characteristics
Assignee: RCA Corp
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Filing: 1955-09-19
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Granted: 1960-08-23
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Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Robert S Weisz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:05
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2658
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
31 words
MAGNETIC COMPOSITIONS HAVING A SUBSTANTIALLY RETANGULAR HYSTERESIS CHARACTERISTIC PREPARED BY FIRING BETWEEN 1075* AND 1275*C. FOR AT LEAST ABOUT ONE HOUR AND THEN RAPIDLY COOLING A FORMED BODY CONSISTING ESSENTIALLY OF:
References Cited (Backward Citations)
US2551711A
Cited
US2636860A
Cited
US2579978A
Cited
US2640813A
Cited
US2549089A
Cited
GB683722A
Cited
GB697219A
Cited
BE518380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |