US3544982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-head magnetic transducer
Assignee: RCA Corp
•
Filing: 1968-05-01
•
Granted: 1970-12-01
•
Expires: 1988-05-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph John Hanak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2763729A
Cited
US2785038A
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US3024318A
Cited
US3187410A
Cited
US3335412A
Cited
US3353261A
Cited
US3435440A
Cited
US3402463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |