Patent US2958664A successfully refreshed from Google Patents.
US2958664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making manganese-zinc ferrites
Assignee: Steatite Research Corp
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Filing: 1956-01-16
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Granted: 1960-11-01
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Expires: 1976-01-16
Abstract
No abstract record available.
Inventors
- 👤 Vassiliev Avenir
- 👤 Clement Rene
- 👤 Varieras Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2658
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
IN A PROCESS FOR THE MANUFACTURE OF MANGANESEZINC FERRITES WITH HIGH MAXIMUM PERMEABILITY FROM RELATIVELY IMPURE COMPONENTS, THE STEPS COMPRISING PROVIDING A MIXTURE CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE PROPORTIONS SET FORTH:
Claim 2
Dependent Claim
34 words
IN A PROCESS FOR THE MANUFACTURE OF MANGANESEZINC FERRITES WITH HIGH MAXIMUM PERMEABILITY FROM RELATIVELY IMPURE COMPONENTS, THE STEPS COMPRISING PROVIDING A MIXTURE CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE PROPORTIONS SET FORTH:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |