US2876374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic tube structures
Assignee: Corning Glass Works
•
Filing: 1955-04-11
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Granted: 1959-03-03
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Expires: 1975-04-11
Abstract
No abstract record available.
Inventors
- 👤 Theodore K Riggen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:05
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/36; H01J29/00; H01J29/46; H01J29/467; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/14; H01J40/00; H01J40/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2099531A
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US2297492A
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US2449493A
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US2533809A
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US2592683A
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US2657309A
Cited
US2645712A
Cited
US2754445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |