Patent US3028448A successfully refreshed from Google Patents.
US3028448A
Expired / Lapsed
US
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Television automatic frequency control apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1956-12-14
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Granted: 1962-04-03
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Expires: 1976-12-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles W Baugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:23
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/50; H03; H03J; H03J7/00; H03J7/02; H03J7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1813923A
Cited
US2509337A
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US2632047A
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US2539042A
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US2677049A
Cited
US2730616A
Cited
US2664464A
Cited
US2714132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |