US2828410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing circuit comprising a self-oscillating triode with intermediate-frequency feed-back
Assignee: US Philips Corp
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Filing: 1954-02-05
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Granted: 1958-03-25
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Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
- 👤 Rongen Jacobus Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:36
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/163; H03; H03D; H03D7/00; H03D7/06; H03D7/08; H04B15/00; H04B15/02; H04B15/04; H04B15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |