Patent US2534769A successfully refreshed from Google Patents.
Patent US3425701A successfully refreshed from Google Patents.
US3425701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reproducing apparatus
Assignee: Individual
•
Filing: 1965-09-07
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Granted: 1969-02-04
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Expires: 1985-09-07
Abstract
No abstract record available.
Inventors
- 👤 Paul Baron Henn Robinson
- 👤 Anthony Alfred James Homer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:13
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/04; G11B17/05; G11B17/051; G11B17/022; G11B17/028; G11B3/00; G11B3/02; G11B3/08; G11B3/085; G11B3/08503; G11B3/08519; G11B3/08522; G11B3/08535; G11B3/08538; G11B3/08554; G11B33/00; G11B33/02; G11B33/022; G11B33/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |