Patent US2904685A successfully refreshed from Google Patents.
US2904685A
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US
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Frequency-doubling circuit arrangement
Assignee: US Philips Corp
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Filing: 1957-06-18
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Granted: 1959-09-15
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Expires: 1977-06-18
Abstract
No abstract record available.
Inventors
- 👤 Salmet Gaston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:56
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03B; H03B19/00; H03J; H03J7/00; H03J7/02; H03J7/16; H04; H04J; H04J1/00; H04J1/02; H04J1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2065565A
Cited
US2653243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |