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US2570701A
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Harmonic-selecting apparatus
Assignee: Individual
•
Filing: 1946-02-13
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Granted: 1951-10-09
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Expires: 1966-02-13
Abstract
No abstract record available.
Inventors
- 👤 Martin Marie-Therese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:08
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/02; G10H2230/00; G10H2230/045; G10H2230/155; G10H2230/195; G10H2230/201; G10H2230/205; G10H2230/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1530498A
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US1295691A
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US1597420A
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US2069316A
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US2233948A
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US2328282A
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US2333148A
Cited
FR884077A
Cited
US2403090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |