US2795648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric amplifier employing ferroelectric materials
Assignee: AT&T Inc
•
Filing: 1952-10-17
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Granted: 1957-06-11
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Expires: 1972-10-17
Abstract
No abstract record available.
Inventors
- 👤 Warren P Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:28
CPC Classifications
H; H03; H03F; H03F11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1860529A
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US2191315A
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US2183708A
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US2242757A
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US2470893A
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US2616989A
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US2611039A
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US2526207A
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US2532060A
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US2484636A
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FR980661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |