Patent US2609269A successfully refreshed from Google Patents.
US2580685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television with reduced band width
Assignee: AT&T Inc
•
Filing: 1949-12-30
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Granted: 1952-01-01
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert C Mathes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:38
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2277516A
Cited
US2219021A
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US2293899A
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US2454652A
Cited
FR906982A
Cited
FR928783A
Cited
FR932934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |