US2623606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reproduction apparatus
Assignee: Individual
•
Filing: 1951-03-06
•
Granted: 1952-12-30
•
Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Corke Alfred James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:44
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/345; H04R1/22; H04R1/28; H04R1/2807; H04R1/283; H04R1/2834; H04R1/2869; H04R1/2892; H04R1/2896; H04R27/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511917A
Cited
US1887629A
Cited
US1830812A
Cited
US1932343A
Cited
US2034014A
Cited
US2205804A
Cited
US2373692A
Cited
US2440078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |