US2713083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color switching system
Assignee: CBS Broadcasting Inc
•
Filing: 1951-12-22
•
Granted: 1955-07-12
•
Expires: 1971-12-22
Abstract
No abstract record available.
Inventors
- 👤 Robert B Tomer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:02
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2389979A
Cited
GB589345A
Cited
US2452293A
Cited
GB620137A
Cited
US2457415A
Cited
US2528510A
Cited
US2479517A
Cited
US2530107A
Cited
US2617875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |