Patent US3196336A successfully refreshed from Google Patents.
Patent US3517342A successfully refreshed from Google Patents.
US3517342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for simulating two mutually coupled inductors and filter stage utilizing the same
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1969-01-17
•
Granted: 1970-06-23
•
Expires: 1989-01-17
Abstract
No abstract record available.
Inventors
- 👤 Henry J Orchard
- 👤 Desmond F Sheahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:51
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04; H03H11/08; H03H11/46; H03H11/48
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2775658A
Cited
US2885492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |