US2092487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentric conductor electric cable
Assignee: AT&T Inc
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Filing: 1936-04-24
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Granted: 1937-09-07
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Expires: 1956-04-24
Abstract
No abstract record available.
Inventors
- 👤 William K Weston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:08
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/18; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T29/49117; Y10T29/49123; Y10T29/51; Y10T29/5185; Y10T29/53; Y10T29/5313; Y10T29/532; Y10T29/53243; Y10T29/53696
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-09-06 | 1941-03-08 | 1941-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-09-06 | 1945-03-08 | 1945-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-09-06 | 1949-03-08 | 1949-09-07 | $7700.00 | Window Closed / Lapsed |