Patent US3434037A successfully refreshed from Google Patents.
US3434037A
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Multiple varactor frequency doubler
Assignee: JOSEPH H HABRA
•
Filing: 1965-04-15
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Granted: 1969-03-18
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Expires: 1985-04-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Habra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:09
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/16; H03B19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2408420A
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US2982922A
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US3076139A
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US3281647A
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US3214684A
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US3268795A
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US3311811A
Cited
US3227917A
Cited
US3307099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |