US2926304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency determining system
Assignee: TDK Micronas GmbH
•
Filing: 1958-04-21
•
Granted: 1960-02-23
•
Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth N Fromm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2083239A
Cited
US2186182A
Cited
DE907665C
Cited
US2654843A
Cited
US2577758A
Cited
US2507525A
Cited
US2525679A
Cited
US2741696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |