Patent US2925388A successfully refreshed from Google Patents.
US2925388A
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Ferrospinel compositions
Assignee: RCA Corp
•
Filing: 1953-07-16
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Granted: 1960-02-16
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Expires: 1973-07-16
Abstract
No abstract record available.
Inventors
- 👤 Robert L Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:45
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265; Y; Y10; Y10S; Y10S264/00; Y10S264/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
30 CONSISTING ESSENTIALLY OF NICKEL FERROSPINEL INCLUDING 0.1 TO 1.5 WGT. PERCENT PERCENT COBALT OXIDE.
Claim 2
Dependent Claim
15 words
A COMPOSITION OF MATTER HAVING A COEFFICIENT OF ELECTROMECHANICAL COUPLING BETWEEN ABOVE 0.18 AND ABOUT
References Cited (Backward Citations)
US2734034A
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US2656319A
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US2659698A
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US2575099A
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US2736708A
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US2723239A
Cited
US2751354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |