US2498730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic amplifier circuit
Assignee: International Standard Electric Corp
•
Filing: 1945-07-07
•
Granted: 1950-02-28
•
Expires: 1965-07-07
Abstract
No abstract record available.
Inventors
- 👤 Williams Herbert Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22484E
Cited
US2051966A
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US2058565A
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US2327641A
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US2171657A
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US2286804A
Cited
US2423337A
Cited
US2439044A
Cited
US2419970A
Cited
US2393624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |