Patent US3468490A successfully refreshed from Google Patents.
US3468490A
Expired / Lapsed
US
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Continuous loop recording tape cartridge
Assignee: Individual
•
Filing: 1966-03-16
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Granted: 1969-09-23
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Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 Austin A Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:35
CPC Classifications
B; B65; B65H; B65H20/00; B65H20/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2318316A
Cited
US2778635A
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US2921787A
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US3257084A
Cited
US3241781A
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US3285526A
Cited
US3304019A
Cited
US3326484A
Cited
US3289964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |