US2397701A
Expired / Lapsed
US
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Frequency control in ultra high frequency circuit
Assignee: International Standard Electric Corp
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Filing: 1943-12-08
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Granted: 1946-04-02
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Expires: 1963-12-08
Abstract
No abstract record available.
Inventors
- 👤 Smyth Charles Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:03
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/14; B; B66; B66B; B66B17/00; B66B17/14; B66B17/26; H01; H01P; H01P7/00; H01P7/02; H03B; H03B5/00; H03B5/18; H03B5/1817; H03B5/1835; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/14; H03C7/00; H03C7/02; H03F; H03F3/00; H03F3/54; H03H; H03H5/00; H03H5/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-01 | 1949-10-01 | 1950-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-01 | 1953-10-01 | 1954-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-01 | 1957-10-01 | 1958-04-02 | $7700.00 | Window Closed / Lapsed |