US2928057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical filter arrangement
Assignee: TDK Micronas GmbH
•
Filing: 1957-01-14
•
Granted: 1960-03-08
•
Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Harold F Jarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:54
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/62; H03H9/02; H03H9/125; H03H9/135; H03H9/48; H03H9/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2407243A
Cited
US2455740A
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US2652542A
Cited
US2607814A
Cited
US2596226A
Cited
US2806328A
Cited
US2709243A
Cited
US2738467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |