Patent US3061675A successfully refreshed from Google Patents.
US3061675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud speaker improvement
Assignee: Texas Instruments Inc
•
Filing: 1958-09-09
•
Granted: 1962-10-30
•
Expires: 1978-09-09
Abstract
No abstract record available.
Inventors
- 👤 Macdonald James Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:26
CPC Classifications
H; H04; H04R; H04R3/00; H04R3/002; H03; H03F; H03F1/00; H03F1/34; H03F1/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2387845A
Cited
US2400953A
Cited
US2683861A
Cited
US2755343A
Cited
US2857461A
Cited
US2864899A
Cited
US2896025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |