US2470425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-frequency drift oscillator
Assignee: Zenith Electronics LLC
•
Filing: 1944-10-20
•
Granted: 1949-05-17
•
Expires: 1964-10-20
Abstract
No abstract record available.
Inventors
- 👤 John F Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:53
CPC Classifications
H; H03; H03L; H03L1/00; H03L1/02; H01; H01F; H01F27/00; H01F27/008
Claims Analysis
Total Claims: 0
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US2407360A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |