US2520823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator frequency control
Assignee: PREMIER CRYSTAL LAB Inc
•
Filing: 1946-04-10
•
Granted: 1950-08-29
•
Expires: 1966-04-10
Abstract
No abstract record available.
Inventors
- 👤 Henry M Bach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:59
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/24; H03J; H03J7/00; H03J7/02; H03J7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2191454A
Cited
US1878308A
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US2076264A
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US1878252A
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US2082813A
Cited
US2115877A
Cited
US2250526A
Cited
US2182790A
Cited
US2447248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |