Patent US3079571A successfully refreshed from Google Patents.
US3079571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter utilizing variable capacitance junction diodes
Assignee: Collins Radio Co
•
Filing: 1957-02-06
•
Granted: 1963-02-26
•
Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 William S Elliott
- 👤 Domenick P Viterisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:38
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/02; H03H; H03H7/00; H03H7/01; H03H7/0153; H03H7/0161; H03H7/17; H03H7/1741; H03H7/1775
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2191315A
Cited
US2243921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |