Patent US3366733A successfully refreshed from Google Patents.
US3366733A
Expired / Lapsed
US
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Video recording system with synchronized film and disk records
Assignee: 3M Co
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Filing: 1963-11-19
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Granted: 1968-01-30
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Hugh F Frohbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:30
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/84; H04N5/85
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) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |