Patent US4729737A successfully refreshed from Google Patents.
US2867685A
Expired / Lapsed
US
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Television recording and reproducing system
Assignee: 3M Co
•
Filing: 1952-02-18
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Granted: 1959-01-06
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Expires: 1972-02-18
Abstract
No abstract record available.
Inventors
- 👤 Johnson Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/917; H04N5/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1771360A
Cited
US1867542A
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US1974911A
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FR832168A
Cited
US2427421A
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US2313915A
Cited
US2347084A
Cited
US2548795A
Cited
US2517808A
Cited
US2629017A
Cited
US2698875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |