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US2567713A
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Light filter for black and white and color television receivers
Assignee: Sightmaster Corp
•
Filing: 1950-05-26
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Granted: 1951-09-11
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Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 Michael L Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:42
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/898; C; C03; C03C; C03C17/00; C03C17/06; C03C17/09; G; G02; G02B; G02B5/00; G02B5/20; G02B5/205; C03C2217/00; C03C2217/20; C03C2217/25; C03C2217/263; C03C2218/00; C03C2218/10; C03C2218/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2090922A
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US2312206A
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US2346810A
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US2494992A
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US2409356A
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US2485561A
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US2476619A
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US2461464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |