US2603418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic indicator tube
Assignee: Farnsworth Research Corp
•
Filing: 1946-12-07
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Granted: 1952-07-15
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Expires: 1966-12-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:55
CPC Classifications
H; H03; H03K; H03K21/00; H03K21/08; G; G01; G01R; G01R23/00; G09; G09G; G09G1/00; G09G1/20; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1072426A
Cited
GB355705A
Cited
US2267827A
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US2283383A
Cited
US2310105A
Cited
US2354768A
Cited
US2405597A
Cited
US2422698A
Cited
US2455639A
Cited
US2436963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |