Patent US2590230A successfully refreshed from Google Patents.
US2590230A
Expired / Lapsed
US
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Cathode-ray tube amplitude indicating apparatus
Assignee: RCA Corp
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Filing: 1947-12-26
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Granted: 1952-03-25
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Expires: 1967-12-26
Abstract
No abstract record available.
Inventors
- 👤 Donald H Castle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:30
CPC Classifications
H; H04; H04N; H04N17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2122499A
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US2143397A
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US2059004A
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US2146862A
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US2221115A
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US2293135A
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US2463969A
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US2444338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |