US2705640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound motion picture apparatus
Assignee: RCA Corp
•
Filing: 1951-05-05
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Granted: 1955-04-05
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Expires: 1971-05-05
Abstract
No abstract record available.
Inventors
- 👤 Valle Guillermo A Del
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:45
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2003434A
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US2257028A
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US2439446A
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US2535480A
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US2585913A
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US2560569A
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US2550916A
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US2588616A
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US2605364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |