US2590263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control apparatus
Assignee: AT&T Inc
•
Filing: 1945-02-13
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Granted: 1952-03-25
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Expires: 1965-02-13
Abstract
No abstract record available.
Inventors
- 👤 Edward D Mead
- 👤 Orwar S A Mesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:48
CPC Classifications
F; F41; F41G; F41G5/00; F41G5/14; F41G5/20; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20762; Y10T74/20834; Y10T74/2084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US922138A
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US1557073A
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US1576934A
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US1774843A
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US1878602A
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US2129204A
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US2306476A
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US2243755A
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US2344441A
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US2342276A
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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) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |