US3460782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable magnetic tape recorder
Assignee: Epsylon Research and Development Co Ltd
•
Filing: 1966-09-22
•
Granted: 1969-08-12
•
Expires: 1986-09-22
Abstract
No abstract record available.
Inventors
- 👤 Heinz Helmuth Findeisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:26
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/675; G11B15/67563; G11B15/67573; G11B15/18; G11B15/1883
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) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |