US2564559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic phase shifting system
Assignee: RCA Corp
•
Filing: 1947-04-29
•
Granted: 1951-08-14
•
Expires: 1967-04-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Canfora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:44
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2230822A
Cited
US2371905A
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US2399421A
Cited
US2376392A
Cited
US2394361A
Cited
US2435207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |