US2897292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High fidelity loudspeaker
Assignee: Individual
•
Filing: 1956-04-19
•
Granted: 1959-07-28
•
Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Francois Joseph Gerard V Bosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:07
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2861; H04R1/2865; H04R1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2084945A
Cited
US2206427A
Cited
US2224919A
Cited
US2565069A
Cited
US2550336A
Cited
US2615995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |