US2929015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically variable impedance
Assignee: Individual
•
Filing: 1955-10-26
•
Granted: 1960-03-15
•
Expires: 1975-10-26
Abstract
No abstract record available.
Inventors
- 👤 Fleming Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:55
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2299945A
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US2439651A
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US2577543A
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US2487697A
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US2600172A
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US2597796A
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US2730632A
Cited
US2792496A
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US2841707A
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US2772388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |