US2743322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state amplifier
Assignee: AT&T Inc
•
Filing: 1952-11-29
•
Granted: 1956-04-24
•
Expires: 1972-11-29
Abstract
No abstract record available.
Inventors
- 👤 John R Pierce
- 👤 Suhl Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:46
CPC Classifications
H; H10; H10N; H10N70/00; H10N70/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1596558A
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US2051537A
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US2524290A
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US2464807A
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US2629079A
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US2600500A
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US2553490A
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US2644930A
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US2649574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |