US3514722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Networks using cascaded quadrature couplers,each coupler having a different center operating frequency
Assignee: Merrimac Research & Dev Inc
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Filing: 1968-07-02
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Granted: 1970-05-26
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Expires: 1988-07-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Cappucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:12
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/17; H03H7/1708; H03H7/0115; H03H7/18; H03H7/21; H03H7/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |