US3414779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated parametric amplifier consisting of a material with both semiconductive and piezoelectric properties
Assignee: Nortel Networks Ltd
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Filing: 1965-12-08
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Granted: 1968-12-03
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Expires: 1985-12-08
Abstract
No abstract record available.
Inventors
- 👤 Bohm John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:16
CPC Classifications
H; H10; H10W; H10W42/00; H03; H03H; H03H7/00; H03H7/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3185935A
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US3231796A
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US3240962A
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US3330957A
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US3277698A
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US3319140A
Cited
US3314035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |