US2817781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image storage device
Assignee: Individual
•
Filing: 1954-05-27
•
Granted: 1957-12-24
•
Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Sheldon Edward Emanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:00
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/52
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
A VACUUM TUBE HAVING A COMPOSITE SCREEN COMPRISING LUMINESCENT MEANS AND PHOTOELECTRIC MEANS AND LIGHT TRANSPARENT SEPARATING MEANS, COMPRISING A POLYESTER.
References Cited (Backward Citations)
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US2219113A
Cited
US2203352A
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US2432084A
Cited
US2603757A
Cited
US2532644A
Cited
US2726328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |