Patent DE1100802B successfully refreshed from Google Patents.
US2921201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent screen for electron-ray tubes operating at low voltage
Assignee: International Standard Electric Corp
•
Filing: 1955-12-15
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Granted: 1960-01-12
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Expires: 1975-12-15
Abstract
No abstract record available.
Inventors
- 👤 Lieb Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/59
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2628201A
Cited
US2683693A
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US2709766A
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US2716082A
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US2689189A
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US2807587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |