US2769966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound system
Assignee: Individual
•
Filing: 1947-07-24
•
Granted: 1956-11-06
•
Expires: 1967-07-24
Abstract
No abstract record available.
Inventors
- 👤 Robert H Rines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:25
CPC Classifications
F; F41; F41G; F41G7/00; F42; F42B; F42B21/00; F42C; F42C13/00; F42C13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1769203A
Cited
US2060198A
Cited
US2143035A
Cited
US2368953A
Cited
US2361177A
Cited
US2409462A
Cited
GB590489A
Cited
US2557949A
Cited
US2403569A
Cited
US2409719A
Cited
US2480561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |