US2686296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise reduction system
Assignee: RCA Corp
•
Filing: 1949-07-14
•
Granted: 1954-08-10
•
Expires: 1969-07-14
Abstract
No abstract record available.
Inventors
- 👤 Harry F Olson
- 👤 Donald F Pennie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:37
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/16; H03G5/18; H03G5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US962262A
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US2073038A
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US2173925A
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US2171671A
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DE693175C
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US2269011A
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US2423263A
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US2340364A
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US2438518A
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US2497693A
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US2580052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |