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US3227653A
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Fluorine containing spinel-type ferrites
Assignee: Weizmann Institute of Science
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Filing: 1962-07-02
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Granted: 1966-01-04
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Expires: 1982-07-02
Abstract
No abstract record available.
Inventors
- 👤 Frei Ephraim Heinrich
- 👤 Schieber Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:34
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625; C04B35/2683
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A SINGLE-PHASE SPINEL-TYPE FERRITE CONTAINING FROM 4 TO 12% BY WEIGHT OF FLUORINE AND HAVING THE FORMULA
Claim 2
Dependent Claim
17 words
A SINGLE-PHASE SPINEL-TYPE FERRITE CONTAINING FROM 4 TO 12% BY WEIGHT OF FLUORINE AND HAVING THE FORMULA
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |