US2656404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated ring lead-in for electron discharge devices
Assignee: AT&T Inc
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Filing: 1950-12-01
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Granted: 1953-10-20
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Expires: 1970-12-01
Abstract
No abstract record available.
Inventors
- 👤 Edward J Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:18
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/26; H01J19/00; H01J19/42; H01J19/50; H01J5/32; H01J5/44; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0008; H01J2893/0033; H01J2893/0037; H01J2893/0041; H01J2893/0043
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |