Patent US2551802A successfully refreshed from Google Patents.
US2551802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase modulator
Assignee: RCA Corp
•
Filing: 1948-01-05
•
Granted: 1951-05-08
•
Expires: 1968-01-05
Abstract
No abstract record available.
Inventors
- 👤 Kreithen Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:27
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1284293A
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US1950406A
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US1900538A
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US2045107A
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US2189896A
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US2231995A
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US2169859A
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US2228869A
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US2414475A
Cited
US2447040A
Cited
US2374000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |