US2552588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma control circuit
Assignee: COLUMBIA BROADEASTING SYSTEM I
•
Filing: 1947-04-26
•
Granted: 1951-05-15
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Expires: 1967-04-26
Abstract
No abstract record available.
Inventors
- 👤 James J Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:45
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/20; H04N5/202; H04N9/00; H04N9/64; H04N9/68; H04N9/69
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2179414A
Cited
US2247512A
Cited
US2255691A
Cited
US2406760A
Cited
US2368453A
Cited
US2406882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |