US2657932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination photographic and magnetic sound record and method for producing same
Assignee: RCA Corp
•
Filing: 1949-04-16
•
Granted: 1953-11-03
•
Expires: 1969-04-16
Abstract
No abstract record available.
Inventors
- 👤 Dorothy L Blaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:51
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/10; G11B5/00; G11B5/74; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |