US3457525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrite junction circulators having biasing connector wire at ferrite center
Assignee: MA Com Inc
•
Filing: 1967-05-16
•
Granted: 1969-07-22
•
Expires: 1987-05-16
Abstract
No abstract record available.
Inventors
- 👤 Marion E Hines
- 👤 Joseph Helszajn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:42
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3341789A
Cited
US3350663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |