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Patent US2668883A successfully refreshed from Google Patents.
US2668883A
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Amplifier for attenuating the higher frequency components of signals
Assignee: General Electric Co
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Filing: 1950-06-10
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Granted: 1954-02-09
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Expires: 1970-06-10
Abstract
No abstract record available.
Inventors
- 👤 Winslow L Hurford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:37
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/42; H03F1/48; H03F1/50; H04; H04N; H04N5/00; H04N5/14; H04N5/20; H04N5/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2032914A
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US2173232A
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US2227604A
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US2269694A
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US2269654A
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US2584332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |