US3389953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound synchronized cartridge
Assignee: SANDBERG AARON L
•
Filing: 1967-06-26
•
Granted: 1968-06-25
•
Expires: 1987-06-26
Abstract
No abstract record available.
Inventors
- 👤 Martin E Gerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:53
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B31/00; G03B31/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1450555A
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US2029415A
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US2901939A
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DE1124348B
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US3212837A
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US3141374A
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US3256775A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |