US3403235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide-range loudspeaker
Assignee: NEWMARKETS Inc
•
Filing: 1965-03-17
•
Granted: 1968-09-24
•
Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Bishop Nathaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:09
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1861222A
Cited
US2014621A
Cited
US1877294A
Cited
US1982443A
Cited
US1967223A
Cited
US2234833A
Cited
US2897292A
Cited
US3138667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |