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US2442766A
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Circuit controlling switch
Assignee: AT&T Inc
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Filing: 1945-03-08
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Granted: 1948-06-08
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Expires: 1965-03-08
Abstract
No abstract record available.
Inventors
- 👤 John S Garvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04; F42D1/045; F42D1/05; H; H01; H01H; H01H13/00; H01H13/70; H01H13/72; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20238; Y10T74/20244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US931148A
Cited
US1704582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |