US3426977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape magazine
Assignee: DEWEK VEREINIGTE DEUTSCHE ELECTRONIC-WERKE GmbH
•
Filing: 1967-01-17
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Granted: 1969-02-11
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Expires: 1987-01-17
Abstract
No abstract record available.
Inventors
- 👤 Richard Siegemund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08721; G03; G03B; G03B21/00; G03B21/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |