US2886729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grid-cathode structure for cathode ray tubes
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1953-10-08
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Granted: 1959-05-12
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Expires: 1973-10-08
Abstract
No abstract record available.
Inventors
- 👤 Lawrence T May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:36
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2099111A
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US2144998A
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US2310811A
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US2436265A
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US2632130A
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US2752523A
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US2644906A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |