US3630912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium titanium bismuth ferrites
Assignee: Ampex Corp
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Filing: 1969-10-03
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Granted: 1971-12-28
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Expires: 1989-10-03
Abstract
Abstract MICROWAVE FERRITIES WITH NARROW RESONANCE LINEWIDTHS, GOOD TEMPERATURE PERFORMANCE, LOW LOSSES, LOW COSTS, AND RECTANGULAR HYSTERESIS LOOPS ARE MADE FROM A LITHIUMTITANIUM FERRITE CONTAINING A SMALL AMOUNT OF BISMUTH. IN ADDITION, SMALL AMOUNTS OF ZINC, COPPER OR MANAGANESE CAN BE PRESENT IN THE FERRITES.
Inventors
- 👤 Giltan Michael Argentina
- 👤 Paul D Baba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2691; C04B35/2608; C04B35/2616
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |