US2680146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Birefringent filter for color television
Assignee: Skiatron Electronics and Television Corp
•
Filing: 1950-05-31
•
Granted: 1954-06-01
•
Expires: 1970-05-31
Abstract
No abstract record available.
Inventors
- 👤 Adolph H Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:20
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22; G; G02; G02B; G02B5/00; G02B5/30; G02B5/3083
Claims Analysis
Total Claims: 0
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US2118160A
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US2493200A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |