Patent US2509909A successfully refreshed from Google Patents.
US2509909A
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Conductive device
Assignee: AT&T Inc
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Filing: 1946-12-31
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Granted: 1950-05-30
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Expires: 1966-12-31
Abstract
No abstract record available.
Inventors
- 👤 Gustoff W Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:40
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/28; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12229; Y10T428/12236; Y10T428/12243; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618; Y10T428/12639; Y10T428/12646; Y10T428/12771; Y10T428/12861; Y10T428/12896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |