Patent US3519846A successfully refreshed from Google Patents.
US3519846A
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US
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Frequency-doubler circuit
Assignee: Zenith Electronics LLC
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Filing: 1967-08-10
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Granted: 1970-07-07
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Expires: 1987-08-10
Abstract
No abstract record available.
Inventors
- 👤 Frank U Bacci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:28
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1646; H04B1/1653; H03; H03B; H03B19/00; H03B19/06; H03B19/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3030566A
Cited
US3209270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |