US3443767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless loop tape cartridge
Assignee: RCA Corp
•
Filing: 1967-01-20
•
Granted: 1969-05-13
•
Expires: 1987-01-20
Abstract
No abstract record available.
Inventors
- 👤 Stephen W Liddle
- 👤 Clarence E Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:34
CPC Classifications
B; B65; B65H; B65H20/00; B65H20/26; G; G11; G11B; G11B15/00; G11B15/70
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) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |