Patent US2668869A successfully refreshed from Google Patents.
US2668869A
Expired / Lapsed
US
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Radio viewing system
Assignee: RCA Corp
•
Filing: 1945-02-26
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Granted: 1954-02-09
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Expires: 1965-02-26
Abstract
No abstract record available.
Inventors
- 👤 Harley A Iams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:13
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2083292A
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US2155471A
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US2206683A
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GB495977A
Cited
US2129669A
Cited
US2283935A
Cited
US2306272A
Cited
US2354591A
Cited
US2442951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |