Patent US3481551A successfully refreshed from Google Patents.
US3481551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless tape cartridge
Assignee: STUART A STEELMAN
•
Filing: 1966-07-18
•
Granted: 1969-12-02
•
Expires: 1986-07-18
Abstract
No abstract record available.
Inventors
- 👤 Stuart A Steelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:21
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/70; B; B41; B41J; B41J32/00; B41J32/02; G11B23/00; G11B23/02; G11B23/04; G11B23/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR749804A
Cited
US2288983A
Cited
US2426838A
Cited
US2940753A
Cited
US2740628A
Cited
US2964256A
Cited
US3088687A
Cited
US3030041A
Cited
GB1001967A
Cited
GB1002123A
Cited
US3241781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |