US2423864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable reactance
Assignee: Consolidated Engineering Co Inc
•
Filing: 1943-02-26
•
Granted: 1947-07-15
•
Expires: 1963-02-26
Abstract
No abstract record available.
Inventors
- 👤 Harold W Washburn
- 👤 Edmund E Hoskins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:44
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR560396A
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US1689339A
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US1948104A
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US1961007A
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US2057458A
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US2013106A
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US2130213A
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US2210970A
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US2269453A
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US2271864A
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US2305268A
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US2338732A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |