US2879406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge tube structure
Assignee: Westinghouse Electric Corp
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Filing: 1955-05-31
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Granted: 1959-03-24
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Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Milton M Wachtel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:06
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385; H01J29/46; H01J29/58; H01J29/62; H01J29/622; H01J29/624; H01J31/00; H01J31/08; H01J31/50; H01J31/501
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |