US3521196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave circuits utilizing ferrite mode transformers
Assignee: Compagnie Francaise Thomson Houston SA
•
Filing: 1965-05-19
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Granted: 1970-07-21
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Roger Salomon Alfandari
- 👤 Robert Pauchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:38
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/20; H01P1/215; H03; H03C; H03C7/00; H03C7/02; H03C7/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2948868A
Cited
US2972122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |