US2501488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetostrictively driven mechanical wave filter
Assignee: Zenith Electronics LLC
•
Filing: 1946-07-19
•
Granted: 1950-03-21
•
Expires: 1966-07-19
Abstract
No abstract record available.
Inventors
- 👤 Adler Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:50
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/48; H03H9/50; H03H9/02; H03H9/125; H03H9/135
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1693806A
Cited
US1742773A
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US1855054A
Cited
US2141277A
Cited
US2268495A
Cited
US2318417A
Cited
US2342813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |