US3504136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum type video tape recorder with a tape wrap of more than 360
Assignee: Individual
•
Filing: 1967-02-27
•
Granted: 1970-03-31
•
Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Alexander R Maxey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:09
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/62; G11B15/64; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2998495A
Cited
US3159501A
Cited
FR1265219A
Cited
GB915671A
Cited
US3293377A
Cited
US3378646A
Cited
US3404241A
Cited
US3333753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |