Patent US3494528A successfully refreshed from Google Patents.
US3494528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensing device for endless tape cartridge
Assignee: Pioneer Corp
•
Filing: 1968-03-13
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Granted: 1970-02-10
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Expires: 1988-03-13
Abstract
No abstract record available.
Inventors
- 👤 Michio Suzuki
- 👤 Minoru Yokota
- 👤 Yoshio Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:47
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G03; G03B; G03B17/00; G03B17/26; G11B23/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3337105A
Cited
US3425609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |