US2429652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling system for power amplifiers
Assignee: International Standard Electric Corp
•
Filing: 1942-02-12
•
Granted: 1947-10-28
•
Expires: 1962-02-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Terman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:40
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/09; H03H7/0115; H03H7/17; H03H7/1741; H03H7/1758; H03H7/1766; H03H7/1775
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1604981A
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US1636713A
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US1611932A
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US1772374A
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US2167079A
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US2226739A
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US2273519A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |