US3402403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating head and disc magnetic recording system
Assignee: RCA Corp
•
Filing: 1965-11-24
•
Granted: 1968-09-17
•
Expires: 1985-11-24
Abstract
No abstract record available.
Inventors
- 👤 Lichowsky Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:16
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/102; G11B27/105; G11B20/00; G11B20/10; G11B20/12; G11B20/1217; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B5/00; G11B5/48; G11B5/52; G11B5/54; G11B5/55; G11B5/5521; G11B5/74; G11B5/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3334193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |