US2768249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for automatically governing dynamic level range in audio frequency circuits
Assignee: CROSLEY BROADCASTING CORP
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Filing: 1951-06-07
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Granted: 1956-10-23
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Expires: 1971-06-07
Abstract
No abstract record available.
Inventors
- 👤 Ronald J Rockwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:26
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1891297A
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US1978184A
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US2144995A
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US2263683A
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US2329558A
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US2204726A
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US2569000A
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US2626322A
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US2581124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |