US3375388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum tubes provided with light conducting members and with a screen of a high photoelectric sensitivity
Assignee: Individual
•
Filing: 1964-08-06
•
Granted: 1968-03-26
•
Expires: 1984-08-06
Abstract
No abstract record available.
Inventors
- 👤 Sheldon Edward Emanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:57
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J2231/00; H01J2231/50; H01J2231/50005; H01J2231/5001; H01J2231/50015; H01J2231/50057; H01J2231/50068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US624392A
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US1873684A
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US2273637A
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US2817785A
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US2727170A
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US3027477A
Cited
US2825260A
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US2972585A
Cited
US2903617A
Cited
US2985784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |