US2490338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic numbering appliance for scenes, for use in the photo-electric recording of sounds
Assignee: Individual
•
Filing: 1946-05-23
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Granted: 1949-12-06
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Expires: 1966-05-23
Abstract
No abstract record available.
Inventors
- 👤 Ezequiel De Selgas Y Marin
- 👤 Alberto Laffon Y Soto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |