US3034986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrite materials
Assignee: GTE Sylvania Inc
•
Filing: 1956-01-03
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Granted: 1962-05-15
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Expires: 1976-01-03
Abstract
No abstract record available.
Inventors
- 👤 Baird Donald Heston
- 👤 Dymon Joseph John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A FERRITE MATERIAL ADAPTEED FOR USE AT MICROWAVE FREQUENCIES APPRECIABLY BELOW 5000 MEGACYCLES PER SECOND, SAID MATERIAL HAVING A SPINEL CRYSTAL STRUCTURE AND CONTAINING MAGNESIUM ALUMINATE AND MAGNESIUM FERRITE IN SOLID SOLUTION TOGETHER WITH MANGENESE AS A METALLIC CONSTITUENT, THE METALLIC CONSTITUENT COMPOSITION OF SAID MATERIAL BEING DEFINED BY THE APPROXIMATE FORMULA
Claim 2
Dependent Claim
52 words
A FERRITE MATERIAL ADAPTEED FOR USE AT MICROWAVE FREQUENCIES APPRECIABLY BELOW 5000 MEGACYCLES PER SECOND, SAID MATERIAL HAVING A SPINEL CRYSTAL STRUCTURE AND CONTAINING MAGNESIUM ALUMINATE AND MAGNESIUM FERRITE IN SOLID SOLUTION TOGETHER WITH MANGENESE AS A METALLIC CONSTITUENT, THE METALLIC CONSTITUENT COMPOSITION OF SAID MATERIAL BEING DEFINED BY THE APPROXIMATE FORMULA
References Cited (Backward Citations)
US1997193A
Cited
US2565861A
Cited
US2579267A
Cited
FR1074864A
Cited
US2981903A
Cited
US2715109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |