US2981688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrites for microwave applications
Assignee: Steatite Research Corp
•
Filing: 1960-05-27
•
Granted: 1961-04-25
•
Expires: 1980-05-27
Abstract
No abstract record available.
Inventors
- 👤 Albers-Schoenberg Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A FERROMAGNETIC FERRITE CONSISTING ESSENTIALLY COMPOSITION OF THE GENERAL FORMULA
Claim 2
Dependent Claim
10 words
A FERROMAGNETIC FERRITE CONSISTING ESSENTIALLY COMPOSITION OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2576456A
Cited
US2565861A
Cited
US2640813A
Cited
US2644930A
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US2745069A
Cited
US2748353A
Cited
US2719274A
Cited
GB697219A
Cited
GB735375A
Cited
US2715109A
Cited
US2877183A
Cited
US2886530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |