Patent US2970276A successfully refreshed from Google Patents.
US2970276A
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US
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Noise reduction systems
Assignee: Raytheon Co
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Filing: 1958-07-03
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Granted: 1961-01-31
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Expires: 1978-07-03
Abstract
No abstract record available.
Inventors
- 👤 Dollinger Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/26; H03F1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2113212A
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US2192275A
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US2268998A
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US2311696A
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US2371416A
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US2622150A
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US2776410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |