US2306291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of assembling the magnet system for acoustic devices
Assignee: RCA Corp
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Filing: 1940-06-25
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Granted: 1942-12-22
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Expires: 1960-06-25
Abstract
No abstract record available.
Inventors
- 👤 Alons Luitje
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:48
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025; H04R31/00; H04R31/006; H04R2209/00; H04R2209/024; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005; Y10T29/4902; Y10T29/49075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-12-21 | 1946-06-22 | 1946-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-21 | 1950-06-22 | 1950-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-21 | 1954-06-22 | 1954-12-22 | $7700.00 | Window Closed / Lapsed |