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US2540824A
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Electrical circuits adjustable by rectilinearly variable elements
Assignee: Individual
•
Filing: 1947-09-10
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Granted: 1951-02-06
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Expires: 1967-09-10
Abstract
No abstract record available.
Inventors
- 👤 Kolks Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:26
CPC Classifications
H; H03; H03H; H03H5/00; H03H5/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR691113A
Cited
US2190082A
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US2047868A
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US2051012A
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US2186099A
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US2256668A
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US2338134A
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US2422774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |