US3384880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc memory storage comprising magnetic heads arranged obliquely to the track
Assignee: US Philips Corp
•
Filing: 1964-09-30
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Granted: 1968-05-21
•
Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 Duinker Simon
- 👤 Haas Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/012; G11B5/48; G11B5/488; G11B5/4886; G11B5/54; G11B5/55; G11B5/5521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3187316A
Cited
US3066196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |