US2926740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic control device for loudspeakers
Assignee: HOLLAND STANDARDS Inc
•
Filing: 1957-09-11
•
Granted: 1960-03-01
•
Expires: 1977-09-11
Abstract
No abstract record available.
Inventors
- 👤 Jesse G Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:27
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2815; H04R1/2819; H04R1/2869; H04R1/2876; H04R1/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190526165A
Cited
US1346491A
Cited
US1969704A
Cited
US2694463A
Cited
FR1133412A
Cited
US2835334A
Cited
US2765864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |