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US2417052A
Expired / Lapsed
US
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High-frequency spark circuit
Assignee: Submarine Signal Co
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Filing: 1942-02-25
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Granted: 1947-03-11
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Expires: 1962-02-25
Abstract
No abstract record available.
Inventors
- 👤 Benioff Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:34
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/282; H; H03; H03B; H03B11/00; H03B11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1634627A
Cited
US1626030A
Cited
US2002181A
Cited
US2032926A
Cited
US2225105A
Cited
US2232559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-10 | 1950-09-09 | 1951-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-10 | 1954-09-09 | 1955-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-10 | 1958-09-09 | 1959-03-11 | $7700.00 | Window Closed / Lapsed |