US3518442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video playback assembly wherein the record disc has optical recordings on both sides
Assignee: Discovision Associates
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Filing: 1968-06-06
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Granted: 1970-06-30
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Expires: 1988-06-06
Abstract
No abstract record available.
Inventors
- 👤 Keith O Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/08; G11B7/085; G11B7/09; G11B7/0901
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) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |