US2548436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television receiver background control circuit
Assignee: Hazeltine Research Inc
•
Filing: 1946-01-25
•
Granted: 1951-04-10
•
Expires: 1966-01-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur V Loughren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H04; H04N; H04N5/00; H04N5/14; H04N5/16; H04N5/165; H04N5/21; H04N5/213; H04N5/44; H04N5/52; H04N5/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2289914A
Cited
US2328946A
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US2254204A
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US2244240A
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US2307375A
Cited
US2214847A
Cited
US2255691A
Cited
US2259520A
Cited
US2463735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |